Editore: South Dakota Geological and Natural History Survey Circular 12, 1923, Pp. 1-12., 1923
Da: Eryops Books, Stephenville, TX, U.S.A.
Paper wrappers; ex-corporate library; split along spine of paper wraps (taped); a couple of tears along edges and center of rear wrap; light creasing of wraps and leaves; o/w in good condition.
Editore: Colorado Geological Survey, Boulder, CO, 1924
Da: The Red Onion Bookshoppe, Hanover, IN, U.S.A.
Stapled Wraps. Condizione: Very Good-. No Jacket. 21 pages with large map (not attached).
Editore: Colorado Geological Survey., 1924
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft cover. Condizione: Good. ORIGINAL 1924 PUBLICATION; softcovers; ex-library; missing rear pocket (but the three folded plates are present; loosely-inserted); small stain spots on fore-edge and upper edge of last approx. 6 leaves; upper corner of last 4 leaves clipped; small hole along edge of one plate (does not touch the map image); o/w contents in good condition. Journal.