by North Carolina State University. Dept. of Engineering Research

1927

by North Carolina State Library

1924

by North Carolina College of Agriculture and Mechanic Arts

1929

by University of North Carolina (1793-1962). Library

1923

by University of North Carolina at Chapel Hill

1925

by University of North Carolina (1793-1962). University Extension Division

1922

by University of North Carolina (1793-1962)

1925

by North Carolina College for Women, University of North Carolina at Greensboro, Woman's College of the University of North Carolina

1930

by North Carolina. Secretary of State

1925

by North Carolina State University. Department of Engineering Research

1929

by North Carolina Agricultural Experiment Station

1921

by University of North Carolina (1793-1962). Library

1926