LC Thesaurus for Graphic Materials I: Subject Terms (TGM I)

LC Thesaurus for Graphic Materials I: Subject Terms (TGM I)- "The primary web page for the Library of Congress Thesaurus for Graphic Materials I: Subject Terms (TGM I), a thesaurus of terms for subject indexing of pictorial materials. TGM I is primarily designed for automated cataloging and indexing systems. It is authorized for use in MARC (Machine-Readable Cataloging) records and adheres to the American National Standards Institute (ANSI) guidelines for thesaurus construction."