TY - RPRT TI - A spectrochemical method for the semiquantitative analysis of rocks, minerals, and ores AU - A.T. Myers AU - Raymond Gilbert Havens AU - P. J. Dunton PY - 1961 DO - 10.3133/b1084i UR - https://pubs.usgs.gov/publication/b1084I ID - b1084I ER -