Editore: Bulletin de la Societe Geologique de France, 6e serie, 1951, pp. 23-30 incl. tipped-in plate., 1951
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft cover. Reprint/offprint; softcovers; ex-library; minor shelfwear w/ light creasing of corners of wraps and leaves; a couple of chips missing on rear wrap; several small nicks/tears along edges of wraps and leaves; pages browned; o/w in good condition.