Williams, Roger John, 1893- Biochemical individuality; the basis for the genetotrophic concept. [electronic resource] . — New York, : Wiley, [c1956]. — 214 p. : illus. 24 cm. Includes bibliographies. LCCN: 56012578 Subjects--Topical Terms: Biochemistry.Biochemical variation. LC Class. No.: QH345 / .W49 Dewey Class. No.: 574.19