by University of Wisconsin--Madison. Agricultural Experiment Station

1916

by University of Wisconsin. University Extension

1909

by University of Wisconsin. Agricultural Experiment Station

1910

by Princeton University. Library

1920

by University of Rhode Island. Agricultural Experiment Station

1909

by University of Florida. Agricultural Experiment Station

1900

by University of Rhode Island. Agricultural Experiment Station

1905

by Ohio State University. College of Agriculture. Extension Service

1915

by Princeton University. Library

1921

by University of Wisconsin

1913

by Ohio State University. College of Agriculture

1899

by University of Southern California

1929