Conservation agriculture, a worldwide challenge  : environment, farmers experiences, innovations, socio-economy policy : Madrid, 1-5 October, 2001 
edited by L. García-Torres, J. Benites, A. Martínez-Vilela 
 - Córdoba  Xul  D.L. 2001 
 - 2 v.  25 cm 
<br/><br/> Volume I: Keynote contributions -- Volume II: Offered contributions 
<br/><br/><label>ISBN: </label>8493223700 (O.c.) 84-932237-2-7 (Volume II) 84-932237-1-9 (Volume I) 
<br/><br/><label>Subjects--Index Terms: </label>Medio ambiente Desarrollo economico y social Economia agricola Sostenibilidad Agricultura