TY  - RPRT
TI  - Preliminary surficial geologic and materials maps of the Pepperell quadrangle, Massachusetts-New Hampshire
AU  - Carl Koteff
AU  - R.P. Volckmann
PY  - 1972
DO  - 10.3133/ofr72213
UR  - https://pubs.usgs.gov/publication/ofr72213
ID  - ofr72213
ER  -