TY  - RPRT
TI  - Obtaining maps and data from the U.S. Geological Survey
AU  - Cheryl A. Hallam
PY  - 1982
DO  - 10.1016/0198-9715(82)90016-3
UR  - https://pubs.usgs.gov/publication/70011229
ID  - 70011229
ER  -