Ecology in practice
1984
Di Castri, Francesco |
Baker, F. W. G. |
Hadley, M. |
Norway, Spitsbergen
People and tourism in fragile environments
1996
Price, Martin F. |
Smith, Valene L. |
Spitzbergen : Einsame Insel im Polarlicht
1968
Büdel, Julius |
Imber, Walter |