颁布单位：[the University of Pittsburgh] |
颁布时间：2010 |
实施时间：2010 |
学科分类：[Agronomy, Betty Crocker, Bonanza Farms, Chicago Board of Trade, Corn, Epic of Wheat, Flour Milling, Frank Norris, General Mills, Henry Agard Wallace, Nonpartisan League, United States, Wheat]
效力级别
2010
