TY  - RPRT
TI  - Reconnaissance bedrock geologic map of the Fitchburg Quadrangle and part of the Ashby Quadrangle, northeast-central Massachusetts
AU  - J. D. Peper
AU  - F.A. Wilson
PY  - 1978
DO  - 10.3133/mf959
UR  - https://pubs.usgs.gov/publication/mf959
ID  - mf959
ER  -