Reference
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- Marcali , K. Wilmington, Delaware : E. I. DuPont de Nemours & Company . Private communication to the author
- Swann , M. H. and Esposito , G. G. 1958 . Detection of Urea, Melamine, Isocyanate, and Urethane Resins. . Anal. Chem. , 30 Jan. : 107