Editore: North Dakota Geological Survey Bull. 46, 1966., 1966
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft Cover. Condizione: Very Good. Softcovers, ex-library, minor shelfwear, o/w in very good condition.
Editore: North Dakota Geological Survey Bull. 46, 1967, 45 pages + maps/sections in pocket., 1967
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft Cover. Condizione: Very Good. Softcovers; ex-library; in very good condition.
Editore: North Dakota Geological Survey Bull. 46, 1967, 45 pages + map in pocket., 1967
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft Cover. ORIGINAL PUBLICATION; Softcovers, ex-library; in very good condition.