00791nam0-22002891i-450-99000373663040332120091111110954.00226308863000373663FED01000373663(Aleph)000373663FED0100037366320030910d1998----km-y0itay50------baengUSy-------001yyR&D and productivitythe econometric evidenceGriliches ZviChicagoUniversity of Chicago Press1998382 p.24 cmGriliches,Zvi<1930- >88778ITUNINARICAUNIMARCBK990003736630403321O4.287994DECTSDECTSR&D and productivity509010UNINA00836nam0-22003011i-450 99000181300040332120190529131430.0000181300FED01000181300(Aleph)000181300FED0100018130020021010d1971----km-y0itay50------baita<<La >>pratica del pirodiserboEttore Gasparetto.Bologna...1971.p. 35-4429 cmEstr. da: Rivista di ingegneria agraria, 2(1):35-44,1971Diserbazione632.954Gasparetto,Ettore73381ITUNINARICAUNIMARCLG99000181300040332160 OP. 87/1143061FAGBCFAGBCPratica del pirodiserbo410414UNINAING01