Sumner, James Batcheller, 1887- Chemistry and methods of enzymes / James B. Sumner and G. Fred Somers - 3rd ed. - New York : Academic Press, 1953 - 462 p. Subjects--Topical Terms: Enzymes. Subjects--Index Terms: Enzym Hoá sinh học Sinh lý học người Dewey Class. No.: 612.0151 / SUM 1953