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by Bolc, Leonard; Szalas, Andrzej
by Leonard Bolc
by BOLC
by Bolc, Leonard; Kulikowski, Juliusz L.; Wojciechowski, Konrad
by Bolc, Leonard; Tadeusiewicz, Ryszard; Chmielewski, Leszek J.; et al.
by Bolc, Leonard; Makowski, Marek; Wierzbicki, Adam
by Bolc, Leonard
by Mcdonald, David D.; Bolc, Leonard
by Bolc, Leonard; Wojciechowski, Konrad; Tadeusiewicz, Ryszard; et al.