Hilton, Peter John Homotopy theory and duality/ by Peter Hilton. - London: Thomas Nelson, 1967. - x, 224 p.: diagrs., 23 1/2 cm. - Notes on mathematics and its applications . Bibliography: p. 219-221. LCCN: 78397522 Nat. Bib. No.: B67-10028 Subjects--Topical Terms: Homotopy theory.Duality theory (Mathematics) Dewey Class. No.: 514.24 / H656h