Verlag: USGS Bulletin 501, 1912, 64 pp. + 2 folded maps in rear pocket., 1912
Anbieter: Eryops Books, Stephenville, TX, USA
Soft cover. Softcovers; ex-corporate library; splits at top and base of rear hinge and several small nicks/chips along edges of wraps; minor shelfwear w/ small creases at corners of wraps and pages; last leaf w/ several nicks along top edge; last page lightly tanned; o/w contents in good condition.