TY  - BOOK
T1  - Classification. Class L: Education.
LA  - English
PP  - Washington
PB  - U. S. Government Printing Office
YR  - 1951
ED  - 3rd ed.
UL  - https://tuklas.up.edu.ph/Record/UP-99796217602080369
OP  - 200
NO  - Earlier editions were issued by the Classification Division of the Library Congress.
CN  - Z 696 U5 L 1951
KW  - Classification, Library of Congress.
KW  - Classification : Books : Education.
ER  -