Niersächsisches Wattenmeer : Grundlagen für ein Schutzprogramm
1979
Wesemüller, Holger |
Augst, Hans-Joachim |
IUCN
A look at threatened species : a report on some animals of the Middle East and southern Asia which are threatened with extermination
1960
Talbot, Lee M. (Lee Merriam) |
Report on environmental issues
1979
Poore, Duncan |