00333nam a2200133Ia 4500008004100000020001100041040001200052041001200064082001700076100001800093245004100111260003600152300001100188230917s9999||||xx |||||||||||||| ||und||  cPOU2.5  e5aMAIN  aEnglish  a797.21 H478L  aHetz, Gerhard 0aLearning to swim: Quickly and safely  aYorkshirebE P Publishingc1975  a116 p.