RT Journal Article SR Electronic T1 Igneous rocks of Yogo Peak, Montana JF American Journal of Science JO Am J Sci FD American Journal of Science SP 467 OP 479 DO 10.2475/ajs.s3-50.300.467 VO s3-50 IS 300 A1 Weed, Walter Harvey A1 Pirsson, L. V. YR 1895 UL http://www.ajsonline.org/content/s3-50/300/467.abstract AB