TY  - RPRT
TI  - Overlay map of the glacial geology of parts of the Tyngsboro and Westford, Massachusetts, quadrangles
AU  - Richard H. Jahns
AU  - M.E. Willard
AU  - W. S. White
AU  - L.W. Currier
AU  - S.E. White
PY  - 1977
DO  - 10.3133/ofr77641
UR  - https://pubs.usgs.gov/publication/ofr77641
ID  - ofr77641
ER  -