Washintong, D.C. United States Government Printing Office, 1943. Soft cover. 8vo. U.S. Department of Commerce, Civil Aeronautics Administration Bulletin No. 25, January 1943. Second edition. Orig. grey wrappers. 246 pp. B&W illustrations, fold-out charts and maps. Sunning to extremities, staining to rear cover, tape repairs to spine and rear joint..... More