00666cam a2200181 a 450000500170000000800410001702000150005803500150007305000170008810000200010524501270012526000480025230000190030044000570031965000320037665000540040870000220046220260818180033.0080811s1981    ie a     r    000|0 eng d  a0907567061  a.b11994162 4aTJ163.2bR931 aRuddle, Kenneth10aRenewable natural reources and the environment :bpressing problems in the developing world /cby ... and Walther Manshard  aDublin :bTycooly International Pub.,c1981  a396 p. :bill. 0aNatural resources and the environment series ;vv. 2 0aRenewable natural resources 0aUnderdeveloped areasxRenewable natural resources1 aManshard, Walther