Ruderman, Harry D. Mathematical systems: : an introduction [electronic resource] / [by] Harry D. Ruderman [and] Abraham M. Glicksman.. — New York, : Benziger, [1971]. — ix, 425 p. : illus., ports. 25 cm. ISBN: 0471744654 9780471744658 LCCN: 70153090 Subjects--Topical Terms: Mathematics. LC Class. No.: QA39.2 / .R8 Dewey Class. No.: 512.9