TY  - BOOK
AU  - Ruan Yuan
AU  - (清) 阮元
TI  - Chou ren zhuan
KW  - History -- Biography -- Astronomers -- Mathematicians -- Qing
KW  - Science -- Astronomy -- Biography -- Qing
KW  - Science -- Mathematics -- Biography -- Qing
N1  - vgl. Hummel [0212/3] S.402
ER  -