Literature Cited
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- Bengtsson, K., and Helm, E. Wallerstein Labs. Communs. 9 (28): 171 (1946).
- Helm, E., and Trolle, B. Wallerstein Labs. Communs. 9 (28): 181 (1946).
- American Society of Brewing Chemists. Report of Subcommittee on Beer Flavor Analysis. Proc. 1962, 1963, 1964, 1965, 1966, 1967, 1968.