1. The breeding of the Cayenne or Yellow-billed Sandwich Tern in Curaçao in 1958;Ansingh;Ardea,1960
2. Verhalten und Biologie der Raubseeschwalbe (Hydroprogne tschegrava);Bergman;Acta Zool. Fenn.,1953
3. Stage of spectation of two allopatric populations of chorus frogs (Pseudacris);Blair;Evolution,1960
4. Étude préliminaire du décodage des informations contenues dans le signal acoustique territorial du Rouge-gorge (Erithacus rubecula L.);Bosnel;C. R. Acad. Sci.,1961
5. The response of chicks of the Franklin's Gull to parental bill-color;Collias;Auk,1957