1. The presence of formaldehyde in wood smoke and in smoked foodstuffs
2. W. W. Chenoweth, 1930 . Food Preservation . John Wiley & Sons, New York, N. Y., 256 .
3. E. Edelmann, Mohler, B. John, and A. Eichhorn, 1939 . Textbook of Meat Hygiene . Lea & Febiger, Philadelphia, Pa., 95 -96 .
4. C. D. Hurd, 1929 . Pyrolysis of Carbon Compounds . Chemical Catalog Co., New York, N. Y., 283 .