observer's pocket series observer's book of firearms / [by] Nicholas Du Quesne-Bird new observer's series new observer's book of warships / Hugh W. Cowin Soldiers of the queen cavalry observer's fighting vehicles directory observer's fighting vehicles directory, World War 2 / research and ed. by Bart Hartmannus Vanderveen the observers series Observers aircraft / William Green ; with silhouettes by Dennis Punnett observer's basic military aircraft directory / comp. by William Green and Gordon Swanborough observer's military vehicles directory observer's military vehicles directory from 1945 / research and ed. by Bart Harmannus Vanderveen [and] Olyslager Organisation Commanders of the British army : Lord Kitchener army quarterly series N.A.T.O. and its prospects / J.D. Warne ; [préface par C.N. Barclay.] treaty series Exchange of notes between the government of the United Kingdom of Great Britain and Northern Ireland and the Government of the United States of America … air raid precautions memorandum air raid warning system / issued by the Home Office (A.R.P. Department) Air raid warning signals / Home office , Air raid precautions department
