TY  - RPRT
TI  - Analytical results of insoluble-residue samples from the Paducah 1 degree x 2 degrees quadrangle, Missouri, Illinois and Kentucky; drill hole Nos. I18-I29 (excluding I23)
AU  - John H. Bullock
AU  - H. W. Folger
AU  - J. D. Sharkey
AU  - C. D. Taylor
PY  - 1991
DO  - 10.3133/ofr91621b
UR  - https://pubs.usgs.gov/publication/ofr91621B
ID  - ofr91621B
ER  -