Baumann, P.C. and M. Mac, "Polycyclic Aromatic Hydrocarbons and Tumours in Brown Bullheads from the Black and Cuyahoga Rivers - Cause and Effects", Can. ###>Baumann, P.C. et M. Mac, «Polycyclic Aromatic Hydrocarbons and Tumours in Brown Bullheads from the Black and Cuyahoga Rivers - Cause and Effects», Can.