“歴代会長紹介: 廣井 勇（ひろいいさみ）工博 勲二等”. 土木学会ホームページ. https://www.jsce.or.jp/outline/chair/chairman.html#chair6, (参照 2023-11-14).
典拠資料：Vernon-Harcourt, Leveson Francis. Harbours and docks: Their physical features, history, construction equipment, and maintenance, with statistics as to their commercial development. V. II. Plates. Clarendon Press, 1885, 16 plates., (Clarendon Press series). 請求記号:EG:v0205 (2024/2/13現在OPAC未登録)
典拠資料：Appleton's dictionary of machines, mechanics engine-work, and engineering. v. 2. H-Z. New ed., D. Appleton, 1869. (2025/1/24現在OPAC未登録)
横書 / Horizontal writing
色：紫
陰陽：陽
形状：長方形
印影外郭：無郭
印文文字数：17
印文改行表記：Property of／I. Hiroi.
Color：Purple
Pos./Neg.：Pos.
Form：Rectangle
Outer frame：No frame
Text length：17
Text with line breaks：Property of／I. Hiroi.