Submarine hydro-phone detection unit(Hakodate area). Report No. 104g, USSBS Index Section 2

Japan communications commission, Hakodate area(Esan). Report No. 104d(2), USSBS Index Section 2

Report of Ships Bombardment Survey Party(Enclosure D) Hakodate Area. Report No. 84, USSBS Index Section 2

Submarine transportation. Report No. 54nn(7), USSBS Index Section 2

Defenses of Hakodate. Report No. 106e, USSBS Index Section 2

Index of hydro-electric plants. Report No. 40i(9), USSBS Index Section 2

Map of Shimotaki hydro plant. Report No. 41ff(2), USSBS Index Section 2

Map of Shimotaki hydro plant. Report No. 41ff(2), USSBS Index Section 2

Map of Shimotaki hydro plant. Report No. 41ff(2), USSBS Index Section 2

Port of Hakodate. Report No. 54sss(3), USSBS Index Section 2

Hakodate Dockyard-Hakodate Dock Company - statistical data. Report No. 48b(6), USSBS Index Section 2

Hakodate Dockyard-Hakodate Dock Company - statistical data. Report No. 48b(6), USSBS Index Section 2

Map showing hydro-electric plants. Report No. 41p(4), USSBS Index Section 2

United States submarine claims. Report No. 1b(32), USSBS Index Section 2

Port of Hakodate. Report No. 83b(1)-(3), USSBS Index Section 2

Consulate area. Report No. 3v(45), USSBS Index Section 2

Tokyo area. Report No. 11l(9), USSBS Index Section 2

Kumamoto area. Report No. 11l(10), USSBS Index Section 2

Schematic diagram of Kawabe hydro plant. Report No. 41g(8), USSBS Index Section 2

Memorandum pertaining to submarine operations. Report No. 64e(3), USSBS Index Section 2

Submarine Warfare, Serial No. 366. Report No. 2-s, USSBS Index Section 8

Submarine Warfare, Serial No. 366. Report No. 2-t, USSBS Index Section 8

Muroran dockyard-Hakodate-statistical data. Report No. 48b(20), USSBS Index Section 2

Muroran dockyard-Hakodate-statistical data. Report No. 48b(20), USSBS Index Section 2

Osaka-Kobe area. Report No. 11l(8), USSBS Index Section 2