TY - RPRT TI - Spectrographic analyses of insoluble-residue samples, Harrison 1 degree by 2 degrees Quadrangle, Missouri and Arkansas; drill holes nos. 11, 12, and 14 AU - M. S. Erickson AU - Barbara Chazin PY - 1987 DO - 10.3133/ofr87520 UR - https://pubs.usgs.gov/publication/ofr87520 ID - ofr87520 ER -