TY  - RPRT
TI  - Colored gravity anomaly and terrain maps of the northeastern United States and adjacent Canada; a description of colored slides
AU  - Robert W. Simpson
AU  - Richard H. Godson
AU  - Wallace A. Bothner
PY  - 1981
DO  - 10.3133/ofr81560
UR  - https://pubs.usgs.gov/publication/ofr81560
ID  - ofr81560
ER  -