Development and social nature of feather pecking /
Riedstra, Bernd Jan.
Rijksuniversiteit te Groningen.
[Groningen? : Rijksuniversiteit Groningen?],
c2003.
One leaf with main points of thesis in Dutch, and one invitation to presentation of thesis, in the form of a bookmark, inserted.
Thesis (Doctoral) -- Rijskuniversiteit te Groningen, 2003.
Includes bibliography (p. [103]-[108]).