TY  - BOOK
AU  - National Philatelic Museum
TI  - Philosophy of collecting
T2  - National Philatelic Museum
PY  - 1953///?]
CY  - Philadelphia, Pa.
PB  - National Philatelic Museum
KW  - Stamp collecting
KW  - United States
KW  - Stamp collectors
N1  - Cover title; Errata inserted
ER  -