TY  - BOOK
ED  - Library of Congress.
TI  - Classification schedules: Acumulation of additions and changes throug 1970 
AV  - Z696.E7 H1972
PY  - 1972///
CY  - Detroit
PB  - Gale research
KW  - Libros
KW  - Clasificación
KW  - Ciencias sociales
N1  - "compiled from sources enumerated on verso"
ER  -