Szukana fraza: [Tytuł = The effects of occupational exposure to hydrocarbons on some immune parameters of workers of the phenol division of a petrochemical plant] lub [Autor = Zeman, Krzysztof] lub [Autor = Tchórzewski, Henryk] lub [Autor = Baj, Zbigniew] lub [Autor = Nowak, Zofia] lub [Autor = Majewska, Ewa] lub [Autor = Pokoca, Lech] lub [Autor = Kocur, Eugeniusz] lub [Autor = Kantorski, Jerzy]