text Ames; Iowa The Iowa State University Press 1967 2nd Printing Ing x, 430 p.: ill.; Index 23 cm. Edited: Kenneth J. Frey PLANT BREEDING 631.52 631.52 SYM p INLIS000000000003846 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)