Algebra (Dover Books on Mathematics)

Problems in Group Theory (Dover Books on Mathematics)

Essays on the Theory of Numbers (Dover Books on Mathematics)

Graph Theory (Dover Books on Mathematics)

Essays on the Theory of Numbers (Dover Books on Mathematics)

Probability Theory: A Concise Course (Dover Books on Mathematics)

Algebras of Holomorphic Functions and Control Theory (Dover Books on Mathematics

Problems in Group Theory (Dover Books on Mathematics)