TY  - RPRT
TI  - Geology of the conterminous United States at 1:2,500,000 scale; a digital representation of the 1974 P.B. King and H.M. Beikman map
AU  - Paul G. Schruben
AU  - Raymond E. Arndt
AU  - Walter J. Bawiec
PY  - 1994
DO  - 10.3133/ds11rel1
UR  - https://pubs.usgs.gov/publication/ds11rel1
ID  - ds11rel1
ER  -