Mountains of the world : water towers for the 21st century
1998
Liniger, Hanspeter |
Weingartner, Rolf |
Grosjean, Martin |
Switzerland, [Government]
Status survey of the African grey parrot [Psittacus erithacus timneh] and development of a management program in Guinea and Guinea-Bissau
2002
Clemmons, Janine R. |
Status, management and conservation of the African grey parrot Psittacus erithacus in Nigeria
2001
McGowan, Philip J. K. |