Global Boundary Events : an Interdisciplinary Conference, Kielce - Poland, September 27-29, 1993 : abstracts - Narkiewicz, Marek, 1951-; Studencka, Barbara; Geldsetzer, Helmut H. J.; Erwin, Douglas H., 1958-; Hladil, Jindřich, 1953-; Kalvoda, Jiří, 1953-; Kowalczewski, Zbigniew; Peryt, Danuta; Racki, Grzegorz; Walaszczyk, Ireneusz (Polish Geological Institute, 1993)