by North Carolina State University. Dept. of Engineering Research

1927

by North Carolina State College. Agricultural Experiment Station

1929

by North Carolina. Dept. of Agriculture

1920

by North Carolina. Department of Agriculture

1918

by North Carolina. Dept. of Agriculture

1920

by North Carolina. General Assembly. Senate

1921

by North Dakota State University

1908

by North Carolina. State Board of Health

1926

by North Carolina. Department of Agriculture

1920

by North Carolina. Treasury Department

1921

by North Carolina State College. Agricultural Extension Service

1915

by North Carolina. Treasury Dept

1921