TY  - RPRT
TI  - Surficial geologic map of parts of Union and Snyder counties, Pennsylvania
AU  - D. E. Marchand
AU  - G.H. Crowl
PY  - 1991
DO  - 10.3133/i2051
UR  - https://pubs.usgs.gov/publication/i2051
ID  - i2051
ER  -