@article{RYBAK_1988, title={CHARACTERIZATION OF NATURAL-HYDROLOGICAL CONDITIONS WITHIN THE VISTULA DELTA /ZULAWY REGION/}, url={https://discussionpapers.rkk.hu/index.php/DP/article/view/2116}, number={Special}, journal={Discussion Papers}, author={RYBAK, Arkadiusz}, year={1988}, month={Jul.}, pages={251–276} }