Romuald Michniewicz, Iwona Michniewicz
Preventive social education as an effective way to prevent drowning. Comparative analysis of world trends
TURYSTYKA I REKREACJA, ZESZYT 7 (1) 2011, s. 155 – 162
Preventive social education as an effective way to prevent drowning. Comparative analysis of world trends
TURYSTYKA I REKREACJA, ZESZYT 7 (1) 2011, s. 155 – 162