Yazar
Ralph Powlesland
6 cilt bulundu.
Ralph Powlesland · Penguin in association with Dept. of Conservation
64 sayfa · 1998
Sea birds / Handbooks, manuals / Identification
Ralph Powlesland · Penguin Books in association with Dept. of Conservation
64 sayfa · 1997
Introduced birds / Identification / Handbooks, manuals
Ralph Powlesland · Pub. Team, Dept. of Conservation
51 sayfa · 2009
Birds / Effect of wind power plants on / Wind power plants / Environmental aspects / Wind turbines
Ralph Powlesland · South Pacific Regional Environment Programme
43 sayfa · 1998
Birds / Flying foxes / Rats / Vertebrate populations
Ralph Powlesland · Dept. of Conservation
33 sayfa · 1989
Kakapo / Planning / Conservation / Birds / Wildlife recovery
Murray Williams, Helen Gummer, Ralph Powlesland, Hugh A. Robertson, Graeme A. Taylor · Science & Technical Pub., Dept. of Conservation
32 sayfa · 2006
Birds / Migration