工場防空計書 – Air Defense of Factories

This document was obtained from the U.S. National Archives in College Park, Maryland. Microfilm Locator: M1655, Roll 77, Summary Report Covering Air-Raid Protection and Allied Subjects in Japan, 10V. For a complete list of related Japanese-language documents held by the National Archives, see Index to Records of the U.S. Strategic Bombing Survey.

工場防空計書 – Air Defense of Factories