TY  - RPRT
TI  - Duck stamps sold within States and counties during sales years 1971-72 through 1980-81
AU  - Samuel M. Carney
AU  - Michael F. Sorensen
AU  - Elwood M. Martin
PY  - 1983
UR  - https://pubs.usgs.gov/publication/ssrw251
ID  - ssrw251
ER  -