Rare Earth Elements and Yttrium in Wyoming (Supersedes Geological Survey Open file Report 87-8) (1991, revised 2002)

King, J.K., 1991 Rare earth elements and yttrium in Wyoming: Wyoming State Geological Survey Industrial Minerals Report 91-3, 125 p. (Supersedes Geological Survey of Wyoming Open File Report 87-8; Revised by R.E. Harris 2002.)