Bush, George C. Basic concepts of mathematics/ George C. Bush and Phillip E. Obreanu. - New York: Holt, Rinehart and Winston, [1965]. - x, 387 p.: illus., 25 cm. LCCN: 65014883 Nat. Bib. No.: GB65-11379 Subjects--Topical Terms: Mathematical analysis. Dewey Class. No.: 510 / B978b