9MICHAEL J.Are hogs like chickens? Enclosure and mecha- nization in two 'white meat' filieres [M]//HUGHES A, REIMER S.Geographies of Commodity Chains.London:Rout- ledge, 2004 : 39-62.
10Michael J: Are hogs like chicken? Enclosure and mechanization in two “white meat” filière [A] . Alex Hughes, Suzaane Reimer. Ge ographies of commodity chains [C] . Landon and New York: Routledge, 2004: 39-62.