Tandyrak R, Parszuto K, Grochowska J. WATER QUALITY OF LAKE EŁK AS A FACTOR CONNECTED WITH TOURISM, LEISURE AND RECREATION ON AN URBAN AREA. qg [Internet]. 2016 Sep. 15 [cited 2024 May 10];35(3):51-9. Available from: https://pressto.amu.edu.pl/index.php/qg/article/view/7551