text London John Wiley & Sons 1951 2nd ed. Ing x, 510 p.: ill.; 24 cm. C.E. Millar; L.M. Turk EARTH FERTILITY PRESERVATION 631.4 631.4 MIL f INLIS000000000003759 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)