00340nam a22001457a 4500003000400000005001700004008004100021020001500062040000800077082001800085245002500103260003600128300001000164650002000174OSt20150429093559.0030206s2002    ck            000 0 spa d  a9682411629  cOSt04221a631bL33700aLabranza secundaria   aMéxico  : bTrillas , c1998.  a64 p.042LEMBxLABRANZA