by University of Massachusetts at Amherst. Cooperative Extension Service

1930

by University of Massachusetts (Amherst campus). Cooperative Extension Service

1912

by Massachusetts. Board of education. Dept. of university extension

1918

by University of Connecticut. Cooperative Extension Service

1929

by University of Massachusetts (Amherst campus). Cooperative Extension Service

1927

by University of Massachusetts (Amherst campus). Cooperative Extension Service

1928

by University of Massachusetts (Amherst campus). Cooperative Extension Service

1914

by University of Massachusetts (Amherst campus). Cooperative Extension Service

1916