Editore: USGS Bulletin 795, 1928 (for 1927), iv + 221 pp. + folded map in rear pocket., 1928
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft cover. Softcovers; minor shelfwear w/ light creasing of corners of wraps and leaves; approx. 2 inch tear on upper rear hinge; rear wrap w/ small tear on fore-edge and a couple of small holes; light tanning/soiling of wraps and edges; o/w in good condition.
Editore: Government Printing Office, Washington, D. C., 1916
Da: T. W. Palmer Books, Eugene, OR, U.S.A.
Prima edizione
Soft cover. Condizione: Very Good. No Jacket. 1st Edition. Reprinted with minor corrections, 23 x 14.5 cm., 142 pp., illustrated (33 plates and 15 figures), 19 folding colored maps, index, original gray-green printed paper wrappers, spine damaged.