Szukana fraza: [Tytuł = The concentration of selected cancer markers \(TPA, TPS, CYFRA 21\-1, CEA\) in workers occupationally exposed to arsenic \(As\) and some heavy metals \(Pb, Cd\) during a two\-year observation study] lub [Autor = Szymańska\-Chabowska, Anna] lub [Autor = Antonowicz\-Juchniewicz, Jolanta] lub [Autor = Andrzejak, Ryszard]