Jet aircraft power systems Zeppelin in combat : a history of the German Naval Airship Division, 1912-1918 / by Douglas H. Robinson 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 Air operations by air defence of Great-Britain and fighter command in connection with the German flying bomb and rocket offensives, 1944-1945 / by Roderic Hill Radio engineering handbook / ed. by Keith Henney, editor-in-chief Mobilizing resources for war : the economic alternatives / Tibor Scitovsky, Edward Shaw, Lorie Tarshis 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]