00454nam a22001337a 4500003000400000005001700004008004100021040000800062082002500070245006900095260005800164300001100222650008700233OSt20160304164154.0030206s2002    ck            000 0 spa d  cOSt04221a634.958217bF57400aFirewood crops :bShrub and tree species for energy production /  aWashington:   bNational academy of sciences, c1980.  a237 p.042LEMBxAGRICULTURAxRÉGIMEN EN LA AGRICULTURA xMEJORAMIENTO SELECTOS DE PLANTAS