TY  - RPRT
TI  - Spectrographic analyses of insoluble-residue samples, Joplin 1 degree x 2 degrees Quadrangle, Kansas and Missouri; drill hole Nos. 71, 72, 73, and 74
AU  - J. H. Bullock
AU  - H. W. Folger
PY  - 1989
DO  - 10.3133/ofr89656
UR  - https://pubs.usgs.gov/publication/ofr89656
ID  - ofr89656
ER  -