RT Journal Article SR Electronic T1 BARITE IN GEORGIA JF Science JO Science FD American Association for the Advancement of Science SP 71 OP 71 DO 10.1126/science.47.1203.71 VO 47 IS 1203 A1 Nelson, Wilbur A. YR 1918 UL http://science.sciencemag.org/content/47/1203/71.1.abstract AB