TY  - BOOK
AU  - Thorp,Prescott Holden
AU  - Bartels,J.Murray
TI  - Catalogue of the 20th century stamped envelopes and wrappers of the United States,: including an appendix listing price revisions of all 19th century entries as listed in Thorp-Bartels, Century edition
U1  - 769/.569/73 
PY  - 1968///]
CY  - Netcong, N.J.
KW  - Postage stamps
KW  - United States
KW  - Stamped envelopes
ER  -