Stephens - Auto Navigation Systems - New paperback or softback - X555z

Staff - Training of Aerial Machine Gunners - New paperback or softback - X555z

Haferkorn - Aerial Photography - New paperback or softback - 29 - X555z

Ledeboer - Aerial Ship - New paperback or softback - 84 - X555z

Rosen - Unmanned Aerial Vehicle - New paperback or softback - X555z

Aeronautics - Aerial Navigation - New paperback or softback - 26 - X555z

Botts - ' Air-ship the Problem of Aerial Navigation - New paperback - X555z

De Bausset - Aerial Navigation - New paperback or softback - 23 - X555z