Schuilstad : bescherming van de bevolking tegen luchtaanvallen / Koos Bosma ; [fotogr. Anja de Jong ; tek. Cyane Conijn] Kampfgeschwader Edelweiss :The history of a German bomber unit / Wolfgang Dierich : [transl. by Richard Simpkins] men-at-arms series Luftwaffe airborne and field units / text by Martin Windrow ; colour plates by Michael Roffe air campaign : planning for combat / John A. Warden III ; with an introduction by Charles L. Donnelly, Jr 2nd TAF / Christopher F. Shores ; ill. by Richard Ward ; [forew. by H. Broadhurst] grote luchtgevechten / Robert Jackson ; [vert. uit het Engels door T. Wesselink ; woord vooraf door Alan Clark]