König-Langlo, Gert (2006): Radiosonde PS65/23807 during POLARSTERN cruise ANT-XXI/4 on 2004-04-09 09:49h. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.384864, In: König-Langlo, G (2005): Upper air soundings during POLARSTERN cruise ANT-XXI/4. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.849356