Gerstein Larry J Discrete mathematics and algebraic structures / Larry J. Gerstein. - New York : W.H. Freeman, 1987. - xv, 413 p. : ill. ; 24 cm. - A Series of books in the mathematical sciences . Includes index. ISBN: 0716718049 Subjects--Topical Terms: MathematicsAlgebra Abstract LC Class. No.: QA39.2