1)ASPA (America Sod Producers Association),美国草皮生产协会2)NAM(National Association of Manufacturers),美国生产厂家协会3)Production Credit Association(U.S.A.),美国生产信贷协会4)Natural Gasoline Association of America,美国天然汽油生产协会5)NWGA National Wool Growers Association,全国羊毛生产者协会[美]6)NLPA National Livestock Producers Association,全国家畜生产者协会[美]
