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	<id>https://wikimd.com/index.php?action=history&amp;feed=atom&amp;title=CODEN</id>
	<title>CODEN - Revision history</title>
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	<link rel="alternate" type="text/html" href="https://wikimd.com/index.php?title=CODEN&amp;action=history"/>
	<updated>2026-04-22T00:30:39Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wikimd.com/index.php?title=CODEN&amp;diff=6499525&amp;oldid=prev</id>
		<title>Prab: CSV import</title>
		<link rel="alternate" type="text/html" href="https://wikimd.com/index.php?title=CODEN&amp;diff=6499525&amp;oldid=prev"/>
		<updated>2025-03-17T05:50:08Z</updated>

		<summary type="html">&lt;p&gt;CSV import&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 05:50, 17 March 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l31&quot;&gt;Line 31:&lt;/td&gt;
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&lt;/table&gt;</summary>
		<author><name>Prab</name></author>
	</entry>
	<entry>
		<id>https://wikimd.com/index.php?title=CODEN&amp;diff=6215944&amp;oldid=prev</id>
		<title>Prab: CSV import</title>
		<link rel="alternate" type="text/html" href="https://wikimd.com/index.php?title=CODEN&amp;diff=6215944&amp;oldid=prev"/>
		<updated>2025-02-10T09:05:04Z</updated>

		<summary type="html">&lt;p&gt;CSV import&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 09:05, 10 February 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l30&quot;&gt;Line 30:&lt;/td&gt;
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		<author><name>Prab</name></author>
	</entry>
	<entry>
		<id>https://wikimd.com/index.php?title=CODEN&amp;diff=5328541&amp;oldid=prev</id>
		<title>Prab: CSV import</title>
		<link rel="alternate" type="text/html" href="https://wikimd.com/index.php?title=CODEN&amp;diff=5328541&amp;oldid=prev"/>
		<updated>2024-02-28T23:34:16Z</updated>

		<summary type="html">&lt;p&gt;CSV import&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;CODEN&amp;#039;&amp;#039;&amp;#039; is a six-character, alphanumeric bibliographic code, assigned to scientific and technical periodicals (and conference proceedings) by the [[Chemical Abstracts Service]] (CAS), a division of the [[American Chemical Society]]. The CODEN system was developed to provide a concise, unique and unambiguous identifier for periodicals, replacing the need for full title citation. &lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
&lt;br /&gt;
The CODEN system was first proposed by [[Eugene Garfield]] in 1954, while he was working at the Welch Medical Library at [[Johns Hopkins University]]. The system was later adopted by the CAS in 1961, and has been in use ever since. &lt;br /&gt;
&lt;br /&gt;
== Structure ==&lt;br /&gt;
&lt;br /&gt;
A CODEN is composed of six characters, the first two of which are alphabetic, representing the first two significant words of the title. The next two characters are numeric, representing the volume number, and the last two characters are alphabetic, representing the first and last significant words of the title. &lt;br /&gt;
&lt;br /&gt;
== Usage ==&lt;br /&gt;
&lt;br /&gt;
CODENs are used by libraries and information services to identify and locate periodicals. They are also used in citations in scientific literature, particularly in the field of chemistry. &lt;br /&gt;
&lt;br /&gt;
== See also ==&lt;br /&gt;
&lt;br /&gt;
* [[International Standard Serial Number]] (ISSN)&lt;br /&gt;
* [[Library of Congress Control Number]] (LCCN)&lt;br /&gt;
* [[Online Computer Library Center]] (OCLC)&lt;br /&gt;
&lt;br /&gt;
== References ==&lt;br /&gt;
&lt;br /&gt;
* Garfield, E. (1955). &amp;quot;The CODEN system for periodical titles&amp;quot;. &amp;#039;&amp;#039;American Documentation&amp;#039;&amp;#039;. 6 (2): 111–117. &lt;br /&gt;
* &amp;quot;CODEN&amp;quot;. &amp;#039;&amp;#039;Chemical Abstracts Service&amp;#039;&amp;#039;. Retrieved 2020-12-01.&lt;br /&gt;
&lt;br /&gt;
[[Category:Library science]]&lt;br /&gt;
[[Category:Chemical Abstracts Service]]&lt;br /&gt;
[[Category:American Chemical Society]]&lt;br /&gt;
[[Category:Bibliography]]&lt;br /&gt;
[[Category:Scientific literature]]&lt;br /&gt;
{{Library-stub}}&lt;/div&gt;</summary>
		<author><name>Prab</name></author>
	</entry>
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