Upper jurassic siliceous sponges from the Swabian alb : taxonomy and paleoecology = Górnojurajskie gąbki krzemionkowe z albu Szwabii : taksonomia i paleoekologia / by Andrzej Pisera ; [ed. Adam Urbanek]. - Pisera, Andrzej (Palaeontologia Polonica, 1997)