Editore: University of Colorado Museum, Boulder, Co, 1964
Da: Xochi's Bookstore & Gallery, Truth or consequences, NM, U.S.A.
Paper Back. Condizione: Near Fine. No Jacket. 100pp.; SC blue w/white; slight rub w/clean,tight pgs. " .summaries of our present understanding of certain selected problems of the area. " some illus.