TY  - RPRT
TI  - Nonopaque heavy minerals in sandstone of Jurassic and Cretaceous age in the Black Hills, Wyoming and South Dakota
AU  - W. J. Mapel
AU  - Wayne A. Chisholm
AU  - Richard E. Bergenback
PY  - 1964
DO  - 10.3133/b1161c
UR  - https://pubs.usgs.gov/publication/b1161C
ID  - b1161C
ER  -