TY - RPRT TI - Chemical analyses of pre-Mazama silicic volcanic rocks, inclusions, and glass separates, Crater Lake, Oregon AU - P. E. Bruggman AU - C. R. Bacon AU - J. S. Mee AU - S. T. Pribble AU - D. F. Siems PY - 1993 DO - 10.3133/ofr93314 UR - https://pubs.usgs.gov/publication/ofr93314 ID - ofr93314 ER -