PROCEEDINGS OF THE ELEVENTH ANNUAL CONVENTION OF THE ASSOCIATION OF OFFICIAL AGRICULTURAL CHEMISTS, BULLETIN No. 43, U.S. DEPARTMENT OF AGRICULTURE, DIVISION OF CHEMISTRY
C. L. Parsons. "PROCEEDINGS OF THE ELEVENTH ANNUAL CONVENTION OF THE ASSOCIATION OF OFFICIAL AGRICULTURAL CHEMISTS, BULLETIN No. 43, U.S. DEPARTMENT OF AGRICULTURE, DIVISION OF CHEMISTRY." Journal of the American Chemical Society 17.4 (1895) 330-332