TY  - RPRT
TI  - Report, of committee on basic research in the field of. industrial minerals and rocks
AU  - G.L. Gillson
AU  - R. H. Jahns
PY  - 1947
DO  - 10.2113/gsecongeo.42.8.737
UR  - https://pubs.usgs.gov/publication/70206917
ID  - 70206917
ER  -