by Pennsylvania State University

1916

by Agricultural College of Pennsylvania. Board of Trustees

1908

by Pennsylvania State University

1915

by Pennsylvania State University. Agricultural Experiment Station

1909

by Pennsylvania State College, Pennsylvania State University

1916

by Pennsylvania State University. Agricultural Experiment Station

1914

by Pennsylvania State College

1925

by Pennsylvania State University. Agricultural Extension Service

1915

by Pennsylvania State University. Agricultural Extension Service

1913

by Pennsylvania

1925

by Pennsylvania State College. Agricultural Extension Service

1913

by Pennsylvania State University. Agricultural Experiment Station

1923