TY  - RPRT
TI  - Conversion of geologic quadrangle maps to geologic coverages
AU  - Joseph F. Connell
AU  - William R. Barron
AU  - Reavis L. Mitchell
PY  - 1994
DO  - 10.3133/ofr94359
UR  - https://pubs.usgs.gov/publication/ofr94359
ID  - ofr94359
ER  -