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5151. Studies in aviation medicine (Volume 6)

5155. Civilian defense (April 1941 - March 1942): selected and annotated bibliography on the organization and administration of air raid protection

5156. Civilian defense (April 1941 - March 1942): selected and annotated bibliography on the organization and administration of air raid protection (Bibliography)

5157. Civilian defense (April 1941 - March 1942): selected and annotated bibliography on the organization and administration of air raid protection (Supplement Number 1)

5158. Civilian defense (April 1941 - March 1942): selected and annotated bibliography on the organization and administration of air raid protection (Supplement Number 2)