http://tobaccodocuments.org/ahf/00267984-7994.html
Bogovski, P.; Davis, W.; Dunger, M.; Griciute, L.; Neurath; Pein, F.G.; Walker, E.A. "Environmental N-Nitroso Compounds Analysis and Formation Nitrosation of Nornicotine in Gaseous Mixtures and Aqueous Solutions". 19760000/P. Bates: 00267984-7994.
http://tobaccodocuments.org/ahf/00267984-7994.html