Plants at work; a summary of plant physiology / by F. C. Steward, assisted by A. D. Krikorian. Steward, F. C. (Frederick Campion) Plant physiology. QK711 .S72 581.1 STP Includes Bibliography p. 179-180. Reading, Mass. : Addison-Wesley Pub. Co. , c1964. c1964. 1964 Text viii, 184 p. : eng Addison-Wesley series in the principles of biology