TY  - RPRT
TI  - Quartz crystal in Brazil
AU  - W. D. Johnston
AU  - R.D. Butler
PY  - 1946
DO  - 10.1130/0016-7606(1946)57[601:qcib]2.0.co;2
UR  - https://pubs.usgs.gov/publication/70215038
ID  - 70215038
ER  -