TY  - BOOK
AU  - Karlen,Harvey M.
TI  - Chicago's crabgrass communities
CY  - Chicago
PB  - Collectors' Club of Chicago
KW  - Post office stations and branches -- Illinois -- Chicago -- History
KW  - Cancellations (Philately) -- Illinois -- Chicago -- History
KW  - Postal service -- Illinois -- Chicago -- History
ER  -