
Basic geometry
djvu
- Author: George D. Birkhoff Ralph Beatley
- Language: English
- Year: 1999

- Author: Paul R. Halmos
- Language: English
- Year: 2006

- Author: J. F. Traub
- Language: English
- Year: 1982

- Author: Elliott W. Cheney
- Language: English
- Year: 2000

Knots and links
djvu
- Author: Dale Rolfsen
- Language: English
- Year: 2003

- Author: Niels Nielsen
- Language: German
- Year: 2005

Algebra
djvu
- Author: Saunders Mac Lane Garret Birkhoff
- Language: English
- Year: 1999

- Author: Laurence Chisholm Young
- Language: English
- Year: 1980

Finite Groups
pdf
- Author: Daniel Gorenstein
- Language: English
- Year: 1980

- Author: P. R. Halmos
- Language: English
- Year: 1951