PT - JOURNAL ARTICLE AU - F. W. Clarke TI - Tschermak's theory of the chlorite group and its alternative AID - 10.2475/ajs.s3-43.255.190 DP - 1892 Mar 01 TA - American Journal of Science PG - 190--200 VI - s3-43 IP - 255 4099 - http://www.ajsonline.org/content/s3-43/255/190.short 4100 - http://www.ajsonline.org/content/s3-43/255/190.full SO - Am J Sci1892 Mar 01; s3-43