Editore: North Dakota Geological Survey., 1938
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft cover. Condizione: Good. ORIGINAL 1938 PUBLICATION; includes the folded map and cross-section (COMPLETE for this publication); issued w/ front paper cover only; ex-corporate library; glue stain on front cover due to library card on verso; light browning of leaves; o/w in good condition. Journal.
Editore: North Dakota Geological Survey, Grand Forks, ND, 1938
Da: Willis Monie-Books, ABAA, Cooperstown, NY, U.S.A.
Softcover. Condizione: Good. No covers. Owner's name on upper margin of title page. ; North Dakota Geological Survey Bulletin 11. With folded map and folded plate in text.