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- Language: English
- Year: 1990
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- Language: English
- Year: 1965
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- Language: English
- Year: 1982
- Author: Petit Bois
- Language: English
- Year: 1961
- Author: Morton Hamermesh
- Language: English
- Year: 1989
- Author: Luther Pfahler Eisenhart
- Language: English
- Year: 2003
- Author: Henri Poincare
- Language: English
- Year: 1952
- Author: Jacques Hadamard
- Language: English
- Year: 1954
- Author: Martin Gardner
- Language: English
- Year: 1984