"Clasificación bibliográfica." . . "Classification Livres." . . "Subject Headings." . . "Subject headings." . "Book Classification." . . "Vedettes-matière." . . . . "Catalogage." . . "Inhaltserschließung." . . "Classification Books." . . "Encabezamientos de materia." . . . . . . . . "Subject Classifying and Indexing of Libraries and Literature"@en . "Subject classifying and endexing of libraries and literature" . . . "Subject classifying and indexing of libraries and Literature" . . . . "Subject classifying and indexing of libraries and literature" . "Subject classifying and indexing of libraries and literature"@en . "Subject Classifying and indexing of libraries and literature" . . . . . . . . . . . . . "Subjet classifying and indexing of libraries and literature" . . . . . . . . . . . . . "Subject classifying and indexing of libraries"@en . . . . . . . . . . . . . "Files (Records)" . . "Abstracting and Indexing as Topic." . .