by Minnesota Historical Society

1868

by Minnesota. Agricultural Experiment Station, St. Paul

1925

by University of Minnesota

1925

by Minnesota. Department of Public Instruction

1912

by University of Minnesota. Agricultural Experiment Station

1902

by University of Minnesota

1928

by University of Minnesota

1914

by University of Minnesota. President

1914

by University of Minnesota

1914

by University of Minnesota. Agricultural Experiment Station

1898

by University of Minnesota

1914

by Minnesota. Agricultural Experiment Station, Saint Anthony Park

1891