text Zwolle W.E.J. Tjeenk Willink 1920 5 de druk Ind 153 p.: ill.; 23 cm. 153 p.: ill.; 23 cm. ELEMA, J. SOIL SCIENCES 631.4 631.4ELEb INLIS000000000011011 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)