1[1]Tomaxaewski M A.A method to qulify effects attributable to management information system in livestock farming[M].Copenhagen :Proc 1st Euro Con Info Tech Agri,1997.15-18.
2[2]Tomaszewski M A.Management information system impact on dairy production for selected herds in Texas[J].Comp Elec Agri,2000,26:1-11.
