Editore: Virginia Polytechnic Institute, 1938
Da: Marbus Farm Books, Winchester, VA, U.S.A.
Paperback. Condizione: Very Good. Staple bound softcover, light shelfwear to covers. Contents clean and tight. 48 pages, notes, fold-out map, b&w photos and illus. Engineering Experiment Station series (Virginia Engineering Experiment Station), no. 35, no. 2, December, 1938.