TY - RPRT TI - Spectrographic analyses of insoluble-residue samples, Harrison 1 degree by 2 degrees Quadrangle, Missouri and Arkansas; drill holes nos. 31, 32 and 34 AU - Barbara Chazin AU - M. S. Erickson PY - 1988 DO - 10.3133/ofr8853 UR - https://pubs.usgs.gov/publication/ofr8853 ID - ofr8853 ER -