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The LCCN numbering system has been in use since 1898, at which time the acronym LCCN originally stood for
Library of Congress Card Number. It has also been called the Library of Congress Catalog Card Number, among other names. The Library of Congress prepared cards of bibliographic information for
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In its most elementary form, the number includes a year and a serial number. The year has two digits for 1898 to 2000, and four digits beginning in 2001. The three ambiguous years (1898, 1899, and 1900) are distinguished by the size of the serial number. There are also some peculiarities in
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in the process of cataloging most books which have been published in the United States. It helps them reach the correct cataloging data (known as a cataloging record), which the
Library of Congress and third parties make available on the Web and through other media.
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Although most of the bibliographic information is now electronically created, stored, and shared with other libraries, there is still a need to identify each unique record, and the LCCN continues to perform that function.
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and would sell duplicate sets of the cards to other libraries for use in their catalogs. This is known as centralized cataloging. Each set of cards was given a serial number to help identify it.
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that is often seen separating the year and serial number is optional. More recently, the
Library of Congress has instructed publishers not to include a hyphen.
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In
February 2008, the Library of Congress created the LCCN Permalink service, providing a stable URL for all Library of Congress Control Numbers.
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101:. The leading zeros padding the number are a more recent addition to the format, so many older works will show less-full codes. The
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numbers beginning with a "7" because of an experiment applied between 1969 and 1972 which added a
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Bibliographic
Processing Cataloging Rules: Library of Congress Control Number (LCCN)
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224:"Library of Congress Update for 2008 ALA Annual Conference: January-May, 2008"
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Serial numbers are six digits long and should include
19:"LCCN" redirects here. For the denomination, see
161:"Types of Numbers Found in LC Catalog Records"
278:Network Development and MARC Standards Office
198:Network Development and MARC Standards Office
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280:. Library of Congress. November 10, 2003.
248:"General Questions About LCCN Permalink"
307:Library of Congress Name Authority File
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204:from the original on February 24, 2011
200:. Library of Congress. June 16, 2006.
342:Library cataloging and classification
284:from the original on October 30, 2017
254:from the original on January 19, 2021
171:from the original on January 25, 2021
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194:"Structure of the LC Control Number"
141:Virtual International Authority File
136:Library of Congress Subject Headings
21:Lutheran Church of Christ in Nigeria
16:Numbering system for catalog records
73:all over the world use this unique
130:International Standard Book Number
115:Accession number (library science)
48:Library of Congress Classification
28:Library of Congress Control Number
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165:Library of Congress Catalog
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318: (archived 2016-05-13)
125:Books in the United States
38:based system of numbering
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250:. Library of Congress.
274:"The LCCN Namespace"
332:Library of Congress
236:on August 28, 2017.
229:Library of Congress
44:Library of Congress
120:Authority control
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286:. Retrieved
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337:Identifiers
288:January 18,
258:January 18,
208:January 18,
175:January 18,
92:check digit
326:Categories
147:References
75:identifier
71:Librarians
40:cataloged
282:Archived
252:Archived
202:Archived
169:Archived
109:See also
36:serially
314:at the
54:History
50:(LCC).
34:) is a
132:(ISBN)
103:hyphen
85:Format
59:their
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260:2021
210:2021
177:2021
32:LCCN
26:The
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