Plant growth regulation. International Conference on Plant Growth Regulation (4th : 1959 : Yonkers, N.Y.) Boyce Thompson Institute for Plant Research. Plant regulators Congresses. QK731 .I55 1959 581 PLA "Fourth International Conference on Plant Growth Regulation sponsored by the Boyce Thompson Institute for Plant Research, the New York Botanical Garden, the Brooklyn Botanic Garden." Includes index Ames : Iowa State University Pres; 1961. 1961. 1961 Text xiv, 850 p. : eng