Published by Wulff & Sager, 1934
Seller: Marbus Farm Books, Winchester, VA, U.S.A.
Hardcover. Condition: good. Ex-library from US Air Force Geophysics Library with usual stampings, etc. Rebound in browm hardcover, no dj with light shelfwear to covers. Contents clean overall. Red mark under author's name on title page. 33 pages, bibliography, several fold-out maps. Dissertation.