PT - JOURNAL ARTICLE AU - Samuel Lewis Penfield TI - Contributions to the crystallization of willemite AID - 10.2475/ajs.s3-47.280.305 DP - 1894 Apr 01 TA - American Journal of Science PG - 305--309 VI - s3-47 IP - 280 4099 - http://www.ajsonline.org/content/s3-47/280/305.short 4100 - http://www.ajsonline.org/content/s3-47/280/305.full SO - Am J Sci1894 Apr 01; s3-47