TY  - RPRT
TI  - Preliminary maps of sand/shale ratio in the Cambrian Bonneterre Formation, Rolla 1 degree by 2 degrees Quadrangle, Missouri
AU  - J. L. Thacker
AU  - K. H. Anderson
PY  - 1979
DO  - 10.3133/mf1002b
UR  - https://pubs.usgs.gov/publication/mf1002B
ID  - mf1002B
ER  -