典拠資料：Ripper, William. Steam-engine: Theory and practice. 7th ed., Longmans, Green, 1914, xii, 514p., [5] folded leaves of plates. 資料ID:1050290616
https://opac.dl.itc.u-tokyo.ac.jp/opac/opac_link/bibid/2003298980
典拠資料：Yasukura Chozaburo. A Study on Air Power. 1922.
https://curation.library.t.u-tokyo.ac.jp/s/db/record/9e38e86b-8093-423d-abda-f33937c5e152
典拠資料：廻舩必用. 卷1-2, 卷3-4. [書写者不明], [書写年不明]. 資料ID:1011894811, 1011894829
https://opac.dl.itc.u-tokyo.ac.jp/opac/opac_link/bibid/2003460078
https://curation.library.t.u-tokyo.ac.jp/s/db/record/12c45d7d-b9e1-4ae5-979c-c746e51ea45f
https://curation.library.t.u-tokyo.ac.jp/s/db/record/77d13a8d-4e68-4d1d-88f3-4aab31a38220
色：紫
陰陽：陽
形状：正方形
印影外郭：単郭
印文文字数：11
印文改行表記：船舶工學／科敎室／圖書之印
Color：Purple
Pos./Neg.：Pos.
Form：Square
Outer frame：Single frame
Text length：11
Text with line breaks：船舶工學／科敎室／圖書之印