算経九章

九章算法記（和算書）

History of the Aomori Prefecture Digital Archive

Documents and Literature Database of Aomori Prefectural History

李国九章

National Institute of Japanese Literature

Collectors'Seals Database

予算経過

神戸大学附属図書館

Kobe University Library Digital Archive Newspaper Clippings Collection

方円算経

National Diet Library, Japan

ARC Early Japanese Book Portal Database

方円算経

National Diet Library, Japan

ARC Early Japanese Book Portal Database

方円算経

National Diet Library, Japan

ARC Early Japanese Book Portal Database

方円算経

National Diet Library, Japan

ARC Early Japanese Book Portal Database

九経談

北海道大学附属図書館 (国文学研究資料館)

IIIF Discovery in Japan

九経註

National Institute of Japanese Literature

IIIF Discovery in Japan

九経談

奈良女子大学学術情報センター (国文学研究資料館)

IIIF Discovery in Japan

九経談

National Institute of Japanese Literature

ARC Early Japanese Book Portal Database

九経註

National Institute of Japanese Literature

ARC Early Japanese Book Portal Database

精算方役所章程

Waseda University Library

ARC Early Japanese Book Portal Database

四十二章経跋文

Kyoto National Museum

Integrated Collections Database of the National Museums, Japan

経済論一〇八章至二〇五章

Waseda University Library

ARC Early Japanese Book Portal Database

都市の紋章 （一〜百九）

神戸大学附属図書館

Kobe University Library Digital Archive Newspaper Clippings Collection

方円算経逐斜

Chiba Prefectral Central Library

Chiba Prefectural Digital Archive

周髀算経図解

筑波大学附属図書館 (国文学研究資料館)

IIIF Discovery in Japan

予算・決算書（昭和二十九年予算決算綴）

Kochi Prefectural Library

OTEPIA Kochi Library collection search

算經十書

Kyushu University Collections

Kyushu University Collections

jiu zhang suan shu . hai dao suan jing

Kyushu University Collections

Kyushu University Collections

算經十書

Kyushu University Collections

Kyushu University Collections

jiu zhang suan shu . hai dao suan jing

Kyushu University Collections

Kyushu University Collections

「源九郎義経」

Tokyo Metropolitan Central Library

ARC Ukiyo-e Portal Database