RT Journal Article SR Electronic T1 Additional notes on the tyrolite from Utah JF American Journal of Science JO Am J Sci FD American Journal of Science SP 271 OP 273 DO 10.2475/ajs.s3-39.232.271 VO s3-39 IS 232 A1 William Francis Hillebrand A1 E. S. Dana YR 1890 UL http://www.ajsonline.org/content/s3-39/232/271.abstract AB