00520nam a22001697a 4500 20220127140340.0 010129d1998 enk r 00110 eng d 83382 84354 1 84014 084 4 94874 338.162 Economics of agro-chemicals : an international overview of use patterns, technical and istitutional determinants, polices and perspectives /ed. by G.A. 199 CONVERSION 10 20130109 UCH01 1346 BK 83382 83382