TY  - RPRT
TI  - Spectrographic analyses of insoluble-residue samples, Joplin 1 degree x 2 degrees Quadrangle, Kansas and Missouri; drill hole Nos. 68, 69, and 70
AU  - J. H. Bullock
AU  - H. W. Folger
PY  - 1990
DO  - 10.3133/ofr9020
UR  - https://pubs.usgs.gov/publication/ofr9020
ID  - ofr9020
ER  -