TY  - BOOK
AU  - Billings,Marland Pratt
TI  - Pegmatites of Massachusetts,
T2  - [Cooperative Geologic Project] Bulletin
AV  - QE461 .B55
U1  - 552.1 
PY  - 1941///
CY  - Boston
KW  - Pegmatites
KW  - Mines and mineral resources
KW  - Massachusetts
N1  - At head of title: Commonwealth of Massachusetts. Dept. of Public Works, U. S. Department of the Interior. Geological Survey
ER  -