by Virginia Polytechnic Institute. Engineering Extension Division

1924

by Virginia. Commission to Survey the Educational System of Virginia

1928

by Virginia. Division of Accounts and Control

1930

by Virginia. Department of Agriculture and Immigration

1928

by Virginia. Office of the Comptroller

1930

by Virginia. Dept. of Agriculture and Immigration

1928

by Virginia. Office of the Comptroller

1929

by Virginia Polytechnic Institute. Engineering Extension Division

1929

by Virginia Polytechnic Institute, Blacksburg. Engineering Extension Division

1929

by Virginia. Commission to Survey the Educational System of Virginia, Michael Vincent O'Shea

1928

by Virginia. Department of Education

1930

by Virginia Polytechnic Institute. Agricultural Extension Service

1915