TY  - RPRT
TI  - Bedrock geologic map of the Ludlow quadrangle, Hampden and Hampshire Counties, south-central Massachusetts
AU  - Gerhard W. Leo
AU  - Peter Robinson
AU  - David Joseph Hall
PY  - 1977
DO  - 10.3133/gq1353
UR  - https://pubs.usgs.gov/publication/gq1353
ID  - gq1353
ER  -