Integrated crop protection  : proceedings of a symposium held at Valence, france, 18-19 june 1980 
edited by Ph. Graffin 
 - Rotterdam  A.A. Balkema  1982 
 - 407 p.  24 cm 
<br/><br/><label>ISBN: </label>9061912296 
<br/><br/><label>Subjects--Index Terms: </label>Proteccion de las plantas Lucha integrada Cultivos