1. Buttery, R. G., and Teranishi, R., Anal. Chem., 33, 1439 (1961).
2. Patton, S., and Josephson, D. V., Food Res., 22, 316 (1957).
3. Lea, C. H., and Swoboda, P. A. T., Chem. and Indust., 1289 (1958).
4. Lillard, D. A., Montgomery, M. W., and Day, E. A., J. Dairy Sci., 45, 660 (1962).
5. Rosen, A. A., Peter, J. B., and Middleton, F. M., J.W.P.C.F., 34, 7 (1962).