TY  - RPRT
TI  - An overview of geologic mapping needs in the United States
AU  - P. D. Rowley
AU  - D. M. Miller
AU  - F. K. Miller
PY  - 1986
DO  - 10.3133/ofr86572
UR  - https://pubs.usgs.gov/publication/ofr86572
ID  - ofr86572
ER  -