[大東亜戦争と海運に関する極秘資料4冊]. [Daitōa Sensō to kaiun ni kansuru gokuhi shiryō 4-satsu]. [Top Secret Papers on Shipping during the Greater East Asia War].
[Japan]. 世界経済調査会. [Sekai Keizai Chōsakai]. Showa 17 [ 1942]. 4 mimeographed papers stapled at upper corners, each stamped either as top secret or secret, 25 x 17.5 cm, Report No. 221: 55pp; Report No. 2025: 10pp; Report No. 2153: 14pp; Report No. 2274: 29pp. Paper browned and friable with minor..... More