TY  - RPRT
TI  - Mineral-resource appraisal of the Rolla 1° x 2° quadrangle, Missouri, as of September 1980- A nontechnical summary
AU  - Walden P. Pratt
PY  - 1983
DO  - 10.3133/cir869
UR  - https://pubs.usgs.gov/publication/cir869
ID  - cir869
ER  -