TY - RPRT TI - Spectrographic and chemical analyses of whole-rock and insoluble-residue samples, Rolla 1 degrees by 2 degrees quadrangle, Missouri; drill holes No. 55 and 56 AU - J.G. Viets AU - Elwin L. Mosier AU - M. S. Erickson AU - S.K. McDanal PY - 1979 DO - 10.3133/ofr791558 UR - https://pubs.usgs.gov/publication/ofr791558 ID - ofr791558 ER -