TY  - BOOK
AU  - Hanmer, R. F.
TI  - A survey of U.S. machine postmarks 1875-1925
PY  - 1981///
CY  - Wallingford, CT 
PB  - R.F. Hanmer
KW  - 	United States | Machine Cancels | Postal Markings | 1875-1925 | Post Office Equipment | 19th Century | 20th Century | Postal History
ER  -