TY  - RPRT
TI  - Quartz crystal deposits of western Arkansas
AU  - A.E.J. Engel
AU  - R.H. Wilpolt
AU  - J. P. Albers
AU  - E. W. Heinrich
PY  - 1943
DO  - 10.3133/ofr4326
UR  - https://pubs.usgs.gov/publication/ofr4326
ID  - ofr4326
ER  -