International Standard Serial Number "ISSN-L" facilitates search, retrieval and delivery across all media versions for services like OpenURL, library catalogues, search engines or knowledge bases. International Standard Serial Number An International Standard Serial Number (ISSN) is an eight-digit serial number used to uniquely identify a serial publication. The ISSN is especially helpful in distinguishing between serials with the same title. ISSN are used in ordering, cataloging, interlibrary loans, and other practices in connection with serial literature. The ISSN system was first drafted as an International Organization for Standardization (ISO) international standard in 1971 and published as ISO 3297 in 1975. ISO subcommittee TC 46/SC
13 (number) In the Mayan Tzolk'in calendar, trecenas mark cycles of 13-day periods. The pyramids are also set up in 9 steps divided into 7 days and 6 nights, 13 days total. In the standard 52-card deck of playing cards there are four suits, each of 13 ranks. In a tarot card deck, XIII is the card of Death, usually picturing the Pale horse with its rider. A baker's dozen, devil's dozen, long dozen, or long measure is 13, one more than a standard dozen. 13 (number) 13 (thirteen) is the natural number following 12 and preceding 14. Strikingly folkloric aspects of