Bibcode: Διαφορά μεταξύ των αναθεωρήσεων
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The '''bibcode''' is an identifier used by a number of [[astronomy|astronomical]] data systems to specify literature references. The bibcode was developed to be used in [[SIMBAD]] and the [[NASA/IPAC Extragalactic Database]] (NED), but is now used more widely, for example, in the NASA [[Astrophysics Data System]].<ref name=a>[http://cdsweb.u-strasbg.fr/simbad/refcode/refcode-paper.html NED and SIMBAD Conventions for Bibliographic Reference Coding], M. Schmitz, G. Helou, P. Dubois, C. LaGue, B. Madore, H. G. Corwin Jr., and S. Lesteven, published in ''Information & On-Line Data in Astronomy'', eds. Daniel Egret and Miguel A. Albrecht, Kluwer Academic Publishers, 1995. ISBN 0792336593.</ref><ref name=b>[http://adsabs.harvard.edu/abs_doc/help_pages/data.html The ADS Data], help page, NASA ADS. Accessed on line [[November 5]], [[2007]].</ref> The code has a fixed length of 19 characters and has the form
<center><tt>YYYYJJJJJVVVVMPPPPA</tt> ,</center>
where YYYY is the four-digit year of the reference and JJJJJ is a code indicating where the reference was published. In the case of a journal reference, VVVV is the volume number, M indicates the section of the journal where the reference was published (e.g., L for a letters section), PPPP gives the starting page number, and A is the first letter of the last name of the first author. Periods (.) are used to fill unused fields and to pad fields out to their fixed length if too short
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| <tt>[http://adsabs.harvard.edu/abs/1974AJ.....79..819H 1974AJ.....79..819H]</tt>
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| <tt>[http://adsabs.harvard.edu/abs/1924MNRAS..84..308E 1924MNRAS..84..308E]</tt>
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| <tt>[http://adsabs.harvard.edu/abs/1970ApJ...161L..77K 1970ApJ...161L..77K]</tt>
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