1. ANON. 1967. Grades of table maple syrup. Fed. Reg. 32 (100), 7579.
2. AOAC. 1950. Official Methods of Analysis. 7th ed. Assoc. of Official Analytical Chemists, Arlington, VA.
3. AOAC. 1970. Official Methods of Analysis. 11th ed. W. Horwitz (editor). Assoc. of Official Analytical Chemists, Arlington, VA.
4. AOAC. 1984. Official Methods of Analysis. 14th ed. S. Williams (editor). Assoc. of Official Analytical Chemists, Arlington, VA.
5. BAUSCH and LOMB. Spectronic 20—Spectrophotometer Operators Manual.