text Wageningen Wageningen Agriculture University 1991 Ind vii, 266 p.: ill.; 24 cm.-- vii, 266 p.: ill.; 24 cm.-- Bibl. p. 241-252. BIE, S. de NATURE CONSERVATION 502.7 INLIS000000000003236 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)