TY - RPRT TI - Quantitative analysis versus semiquantitative optical emission spectrographic analysis of chromium, nickel, zinc, vanadium, and molybdenum in organic-rich Paleozoic marine strata, Western United States AU - George A. Desborough AU - F. G. Poole AU - Edwin K. Maughan AU - H.L. Groves AU - Gregory N. Green PY - 1980 DO - 10.3133/ofr801271 UR - https://pubs.usgs.gov/publication/ofr801271 ID - ofr801271 ER -