Blueprint of wiring plan of Tokyo siren system. Report No. 4k, USSBS Index Section 2

Blueprint of water distribution system (Japanese). Report No. 7u, USSBS Index Section 2

Blueprint maps of the 12 Tokyo water districts. Report No. 4s, USSBS Index Section 2

Plan for air defense of Tokyo. Report No. 4zz, USSBS Index Section 2

Blueprint of engine. Report No. 19c(9), USSBS Index Section 2

Blueprints of wiring system of sirens and the central control panel in Kobe. Report No. 7i, USSBS Index Section 2

Tokyo water system: Explanation of Tokyo waterworks for USSBS. Report No. 12c(3)(f), USSBS Index Section 2

Plan of Tokyo City and nearby areas. Report No. 41hh(2), USSBS Index Section 2

Tokyo air-defense system. Report No. 10pp(8), USSBS Index Section 2

Blueprint of camouflage pattern for one large factory in Tokyo. Report No. 4ll, USSBS Index Section 2

Four sectional map of the Tokyo water system. Report No. 4p, USSBS Index Section 2

Tokyo water system: Explanation of installations of Tokyo water-works. Report No. 12c(3)(e), USSBS Index Section 2

Plan of substation. Report No. 41o(2), USSBS Index Section 2

Plan of substation. Report No. 41o(2), USSBS Index Section 2

Sewage System of Tokyo City, Serial No. 321. Report No. 2-t, USSBS Index Section 8

Sewage System of Tokyo City, Serial No. 321. Report No. 2-s, USSBS Index Section 8

Sewage System of Tokyo City, Serial No. 321. Report No. 2-s, USSBS Index Section 8

Sewerage System of Tokyo, Serial No. 321. Report No. 2-c(13), USSBS Index Section 8

Plan of plant. Report No. 41t(4), USSBS Index Section 2

Plan of plant. Report No. 41s(4), USSBS Index Section 2

Second Naval Fuel Depot - Yokkaichi: Plan of water system. Report No. 51a(8)(jj), USSBS Index Section 2

Second Naval Fuel Depot - Yokkaichi: Plan of foamite system. Report No. 51a(8)(m), USSBS Index Section 2

Catalog of Ibuki Manufacturing Company of Osaka (siren manufacturer). Report No. 4i, USSBS Index Section 2

Chart of Edogawa apartment house air-raid defense organization and blueprint plan of building (Japanese). Report No. 4gg, USSBS Index Section 2

Plan of dispersion tunnel. Report No. 39g(2), USSBS Index Section 2