00495nam a2200121Ia 4500008004100000082001800041100002000059245006600079250000900145260003300154300000600187650018000193150614s9999    xx            000 0 und d  a333.76  ECK-L  aEckholm P. Erik  aLosing Ground - Environmental Stores and World Food Prospects  a1-ED  bW.W. Norton & Co. Inc.c1976  a0  aLosing Ground - Environmental Stores and World Food Prospects Eckholm P. Erik,333.76  ECK-L  Agricultureal ecology,Man-influance on nature,Food supplay ,Soil erosion,Sociology