PDF) Frauke Kraas, Dietrich Soyez, Carsten Butsch, Franziska Krachten, Holger Kretschmer (eds.) (2015): IGC Cologne 2012. Down to Earth. Documenting the 32nd International Geographical Congress in Cologne 26-30 August 2012. Kölner Geographische
PDF) Frauke Kraas, Dietrich Soyez, Carsten Butsch, Franziska Krachten, Holger Kretschmer (eds.) (2015): IGC Cologne 2012. Down to Earth. Documenting the 32nd International Geographical Congress in Cologne 26-30 August 2012. Kölner Geographische