00322nam a2200097Ia 4500245001800000100004300018942000700061008004100068999001900109952009600128 0aPolar region   a MAYER, Cassie   Oxford, 2008  935191  cBK210818s9999    xx            000 0 und d  c442420d442419  00104070aPHUMLbPHUMLd2021-08-23g211.56l0p33228022227332r2021-08-23w2021-08-23yBK