PT - JOURNAL ARTICLE AU - Allen, Oscar D. AU - Comstock, W. J. TI - Bastnaesite and tysonite from Colorado AID - 10.2475/ajs.s3-19.113.390 DP - 1880 May 01 TA - American Journal of Science PG - 390--393 VI - s3-19 IP - 113 4099 - http://www.ajsonline.org/content/s3-19/113/390.short 4100 - http://www.ajsonline.org/content/s3-19/113/390.full SO - Am J Sci1880 May 01; s3-19 AB - Occurrence, habit, physical properties and chemical analysis of specimens from near Pikes Peak