text Oxpord Blackwell 1960 Ing xv, 256 p.: ill.; 23 cm. Edited: John L. Harper WEEDS BIOLOGY 632.5 632.5 SYM b INLIS000000000003865 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)