Berlin, Julius Springer Publisher, 1911. 172pp, photo and drawing illus, 8x11", hardcover. Progress in aeroplane and airship design, development and production. Technical specs and charts. Articles on Parseval airship types, tables listing aviation personnel, results of airfoil tests and charts of lift/drag, airshow trophy photos, tables of balloon records, progress in various countries, etc . German text. Fair-good, x-lib with only one rubber stamp on title page.