Trends in the development of preventive measures against natural hazards in Polish collieries / Z. BURTAN, A. ZORYCHTA, D. CHLEBOWSKI // W: New challenges and visions for mining : 21st World Mining Congress : 7–11 September 2008, Poland, Kraków–Katowice–Sosnowiec : abstracts of articles with congress framework programme. — [Poland : s. n.], [2008]. — Na s. tyt. dodatkowo: 21st World Mining Congress & Expo 2008. — S. 111–112. — Pełny tekst W: New challenges and visions for mining : 21st World Mining Congress : underground mine environment, methane treatment, ground control & rock burst, work safety in mining : 7–12 September 2008, Poland, Kraków–Katowice–Sosnowiec / eds. Jacek Skiba, [et al.]. — Kraków : Agencja Reklamowo-Wydawnicza „OSTOJA”, 2008. — Na s. tyt. dod.: 21st World Mining Congress & Expo 2008. — ISBN 978-83-921582-7-1. — S. 143–151. — Bibliogr. s. 151, Abstr.