The following document is a translation of 時局防空必携解説 Air Defense Handbook Commentary – 1943 Revised Edition. The translation was carried out by the United States Strategic Bombing Survey. Source: U.S. National Archives in College Park, Maryland. Microfilm Locator: M1655, Roll 77.
Air Defense Manual, English Translation
Homeland Air Defense Operations Record
Homeland Air Defense Operations Record – Japanese Monograph No