00606nam a2200217 a 450000100080000000500110000800800410001910000180006024500390007826000480011730000100016549000270017565000280020265000210023065000250025165000150027665000290029165000180032065000310033870000190036910008222014-02-22       1993    bl uuuu     u00u1 u    #d1 aLOCKERETZ, W.  aAgricultural Research Alternatives  aLincoln (USA): University of Nebraskac1993  a239p.  aOur Sustainable Future  aAGRICULTURA ALTERNATIVA  aDESARROLLO RURAL  aEDUCACION PERMANENTE  aENSEÑANZA  aEXPERIMENTACION EN CAMPO  aINVESTIGACION  aNECESIDADES DE INFORMACION1 aANDERSON, M.D.