TY  - RPRT
TI  - Duck stamps sold within States and counties during sales years 1966-67 through 1975-75.
AU  - Samuel M. Carney
AU  - Michael F. Sorensen
AU  - Elwood M. Martin
PY  - 1978
UR  - https://pubs.usgs.gov/publication/ssrw210
ID  - ssrw210
ER  -