TY - RPRT TI - Spectrographic analyses of insoluble-residue samples, Harrison 1 degree by 2 degrees Quadrangle, Missouri and Arkansas; drill holes nos. 15, 18, and 19 AU - Barbara Chazin AU - M. S. Erickson PY - 1988 DO - 10.3133/ofr8854 UR - https://pubs.usgs.gov/publication/ofr8854 ID - ofr8854 ER -