good read Russian Army in World War I / Ward Rutherford weapon Browning .30-caliber machine guns / Gordon L. Rottman Through the Serbian campaign : the great retreat of the Serbian army / by Gordon Gordon-Smith ; with a pref. by M.S. Boshkovitch My mystery ships / by Gordon Campbell ; with a forew. by Lewis Bayly ; ill. by J.E. Broome American & German helmets & body armor of World War One / by Bashford Dean ; ed. by Hayes Otoupalik, Dennis Gordon, Paul J. Schulz elite series U-boat crews : 1914-45 / Gordon Williamson ; ill. by D. Pavlovic
