Zeppelin in combat : a history of the German Naval Airship Division, 1912-1918 / by Douglas H. Robinson Knowing and drawing trees / written and illustrated by A. Hill Indian Army Uniforms under the British from the 18th century to 1947 : cavalry / W.Y. Carman Chemical warfare / by Amos A. Fries and Clarence J. West evolution of fashion: pattern and cut from 1066 to 1930 / [by] Margot Hamilton Hill, [drawings], Peter A. Bucknell [text and patterns] West Point : "the key to America" / John Crane and James F. Kieley ; forew. by the president of the United States radio communication series Radio direction finders / by Donald S. Bond radiation laboratory series Radar aids to navigation / ed. by John S. Hall atlantic policy studies Atlantic idea and its European rivals / Harold van B. Cleveland ; [forw. by Charles M. Spofford] introduction to the chemistry of plant products / Paul Haas and T.G. Hill United States and disarmament / Benjamin H. Williams Air navigation : British empire edition / by P.V.H. Weems ; ed. by Arthur J. Hughes and P.F. Everitt