text Johannesburg Hydro-Chemical Industries (PTY) 1955 Ing 207 p.: ill.; 27 cm. Maxwell Bentley CROPPING SYSTEMS VERMICULATES 631589 631.589 BEN g INLIS000000000003971 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)