TY  - RPRT
TI  - About the geologic map in the National Atlas of the United States of America
AU  - John C. Reed
AU  - Charles A. Bush
PY  - 2007
DO  - 10.3133/cir1300
UR  - https://pubs.usgs.gov/publication/cir1300
ID  - cir1300
ER  -