2
   
3
   
4
   
5
   
8
Published: Amsterdam [u.a.], Elsevier, 2007
   
9
   
14
Published: Berlin, EF-Verl. für Energie- und Umwelttechnik, 1990
   
15
   
16
Published: Düsseldorf, VDI-Verlag, 1982
   
17
Published: Bremen, Studiengang Geographie, Fachbereich 8, Univ. Bremen, 1984
   
19
Published: Bonn, Economica-Verl., 1993
   

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