TY - RPRT TI - Semiquantitative spectrographic and chemical analyses of rocks from the lower plate of the Roberts Thrust, north-central part of the Cortez quadrangle, Nevada AU - Ralph Leroy Erickson PY - 1964 DO - 10.3133/ofr6450 UR - https://pubs.usgs.gov/publication/ofr6450 ID - ofr6450 ER -