Giblin, P. J. Graphs, surfaces, and homology : an introduction to algebraic topology / P.J. Giblin. - 2nd ed. - London : Chapman and Hall, 1981. - xvii, 329 p. : ill. - Chapman and Hall mathematics series . ISBN: 0412239000 Subjects--Topical Terms: Algebraic topology. Dewey Class. No.: 514.2