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Identification of maturity of knowledge management on Extension Theory
cui wei1; yang huabang2; din jun3 (1.school of humanlities & economic management; china university of geosciences(beijing) beijing 100083; china; 2.linyi bangtai industrial co.ltd; shan dong liny 276034; china; 3.china iron & steel research institute group; beijing 100081; china)
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