TY  - BOOK
AU  - Flack, Wylie
AU  - Stets, Robertr J.
TI  - Trolley car mail service in Philadelphia
PY  - 1971///
CY  - [Philadelphia]
PB  - The Associated Stamp Clubs of South Eastern Pennsylvania and Delaware, Inc.
KW  - United States -- Pennsylvania -- Philadelphia | Street Car Mail | Mobile Post Offices | Railway Mail | Transportation of Mail | Postal History
ER  -