Within bibliographic references (<element-citation> and <mixed-citation>), International Standard Series Number, an eight-character code that provides title identification for serial publications. Such numbers may be assigned to one or more versions of a journal by the ISDS (International Serials Data System) in Paris or by one of the national ISDS Centers.
<!ELEMENT issn (#PCDATA %issn-elements;)* >
Text, numbers, or special characters, zero or more
<element-citation>, <mixed-citation>, <product>, <related-article>, <related-object>
No sample is available at this time.