Jensen, P. Boysen Growth Hormones in Plants - New York McGraw-Hill 1936 - 268 Zb mean Botany Page 500-509 (Acc. No. Zb1-Zb343) & Page 578-581 (Acc. No. Zb344-Zb468) Subjects--Topical Terms: Plant anatomy Dewey Class. No.: Zb410