TY  - RPRT
TI  - Value of domestic production of minerals from various classes of rocks
AU  - Vincent E. McKelvey
AU  - J.E. Crawford
AU  - D.F. Davidson
AU  - Robert Leland Boardman
PY  - 1950
DO  - 10.2113/gsecongeo.45.5.470
UR  - https://pubs.usgs.gov/publication/70215318
ID  - 70215318
ER  -