X-ray investigations of polymer structures II : 2-5 December 1999, Szczyrk, Poland Andrzej Włochowicz, chair/editor ; organized by Technical University of Łódź (Poland), European Polymer Federation, [and] Andrzej Sikora, Voivode of Bielsko-Biała (Poland) ; sponsored by State Committee for Scientific Research, (Poland) ... [et al.]