Gawlikowski, Andrzej, and Andrzej Zalewski. “Issues of Tourist and Recreaction Management in the Publications by the Post-Graduate School of Urban Planning and Spatial Economy at Warsaw Polytechnic”. Turyzm/Tourism 13, no. 1 (June 30, 2003): 117–124. Accessed May 6, 2024. https://czasopisma.uni.lodz.pl/tourism/article/view/10613.