1. Parent-young recognition in the Coot Fulica atra;Alley;Ibis,1950
2. An introduction to the study of the ethology of cichlid fishes;Baerends;Behaviour,1950
3. The non-heritable aspects of family unity in birds;Cushing;Condor,1949
4. Zur Ethologie junger Anatiden;Fabricius;Acta Zool. Fenn.,1951
5. Experiments on the following-reaction of ducklings;Fabricius;Rept. Wildfowl Trust,1954