Editore: Simposio Panamericano del Manto Superior, 1968, pp. 23-28., 1968
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft cover. Reprint; Softcovers; minor shelfwear w/ light creasing of corners of wraps and leaves; wraps lightly stained and foxed; o/w in good condition.