Encyclopedia of Minerals, 2nd ed. (by W. L. Roberts, T. J. Campbell, and G. R. Rapp, Jr., 1989)
, 2nd ed. (by W. L. Roberts, T. J. Campbell, and G. R. Rapp, Jr., 1989)v. 26169–170
White, John S. 1990. [Book review] "Encyclopedia of Minerals, 2nd ed. (by W. L. Roberts, T. J. Campbell, and G. R. Rapp, Jr., 1989)." Gems and Gemology, 26, 169–170.