Reglas de Intercalación de la Biblioteca del Congreso

= Library of Congress Filing Rules

Ex. This code was used in the Library of Congress in a number of its computer-produced files and catalogues and superseded in 1980 by the Library of Congress Filing Rules.

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= Library of Congress Filing Rules

Ex: This code was used in the Library of Congress in a number of its computer-produced files and catalogues and superseded in 1980 by the Library of Congress Filing Rules.