Significance of tourmaline-rich rocks in the Grenville Complex of St. Lawrence County, New York : a study of tourmaline compositions and their possible use as indices of mineralization / by C. Ervin Brown and Robert A. Ayuso.
Publication Info.
[Reston, Va.] : Department of the Interior, U.S. Geological Survey, 1985.
[Washington, D.C.] : United States Government Printing Office