by Minnesota Butter, Cheese, and Dairy Stock Association

1886

by Minnesota

1901

by Minnesota State Dairyman's Association

1909

by Minnesota State Dairyman's Association

1904

by Minnesota. Agricultural Experiment Station, Saint Anthony Park

1916

by University of Minnesota. Agricultural Experiment Station

1913

by University of Minnesota

1912

by University of Minnesota. Institute of Agriculture, Forestry, and Home Economics

1917

by Minnesota

1918

by University of Minnesota. Agricultural Extension Service

1919

by University of Minnesota. Agricultural Experiment Station

1914

by Minnesota. Secretary of State

1896