TY  - RPRT
TI  - Geologic maps on Alaska published by the U.S. Geological Survey, post-1930: scales 1:20,000 to 1:63,360 (through October 1982)
AU  - B. A. Hopkins
PY  - 1983
DO  - 10.3133/ofr83578
UR  - https://pubs.usgs.gov/publication/ofr83578
ID  - ofr83578
ER  -