TY  - RPRT
TI  - Preliminary bedrock geologic map of the Lowell-Westford area, Massachusetts
AU  - Richard H. Jahns
AU  - M.E. Willard
AU  - Walter S. White
PY  - 1959
DO  - 10.3133/ofr5970
UR  - https://pubs.usgs.gov/publication/ofr5970
ID  - ofr5970
ER  -