Tactisch trainen in Texas : Fort Hood: 'Goose Bay' voor de Apaches? / Willem Helfferich the texas division in combat Pictorial history of the 36th "Texas" Infantry Division / [compiled by the 36th Division Pictorial History Team ; editor, Richard A. Huff] Apaches in Texas / door Willem Helfferich Tweets, Texans en Talons in Texas / door Willem Helfferich Houten plaquette ter herinnering aan het bezoek van Luitenant Generaal Frederik J. de Jong aan de Sheppard Air Force Base in Texas (VS) F-16 Rollout Information Folder Lubrication : a technical publication devoted to the selection and use of lubricants / publ.by the California Texas Oil Company
