TY  - RPRT
TI  - Analytical results of insoluble-residue samples from the Paducah 1 degree x 2 degrees quadrangle, Missouri, Illinois, and Kentucky: Drill holes nos. K1-K4
AU  - John H. Bullock
AU  - Helen W. Folger
AU  - John D. Sharkey
AU  - Cliff D. Taylor
PY  - 1991
DO  - 10.3133/ofr91372a
UR  - https://pubs.usgs.gov/publication/ofr91372A
ID  - ofr91372A
ER  -