TY - RPRT TI - Spectrographic analyses of insoluble-residue samples, Harrison 1 degree x 2 degrees quadrangle, Missouri and Arkansas : drill hole nos. 64, 65, 66, and 67 AU - Barbara Chazin AU - M. S. Erickson PY - 1988 DO - 10.3133/ofr88529 UR - https://pubs.usgs.gov/publication/ofr88529 ID - ofr88529 ER -