aerograph General Dynamics F-16 Fighting Falcon 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 F-16 Rollout Information Folder
