The Condor question, captive or forever free? /

Lignende værker

• Song dialects and demes in sedentary populations of the white-crowned sparrow (Zonotrichia leucophrys nuttalli) /
  af: Baptista, Luis Felipe
  Udgivet: (1975)
• Australian honeyeaters /
  af: Officer, Hugh R. (Hugh Ronald), 1898-
  Udgivet: (1964)
• Life histories of North American cardinals, grosbeaks, buntings, towhees, finches, sparrows, and allies; order Passeriformes: family Fringillidae
  af: Bent, Arthur Cleveland, 1866-1954
  Udgivet: (1968)
• Return of the whooping crane /
  af: Doughty, Robin W.
  Udgivet: (1989)
• Australian flycatchers and their allies,
  af: Officer, Hugh R. (Hugh Ronald), 1898-
  Udgivet: (1969)