Contributions to mineralogy from the United States Geological Survey, by F.W. Clarke, W.F. Hillebrand, F.L. Ransome, S.L. Penfield, Waldemar Lindgren, George Steiger, and W.T. Schaller. [U.S. Geological Survey Bulletin No. 262. Series D, Petrography and Mineralogy, 32. Series E, Chemistry and Physics, 46.]