TY  - GEN
AU  - Merrill,William Stetson
ED  - American Library Association.
TI  - Code for classifiers: principles governing the consistent placing of books in a system of classification 
U1  - 025.4 21
PY  - 1939///
CY  - Chicago
PB  - American Library Association
KW  - CLAVES DE AUTOR
ER  -