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Ames, P (1966). «DDT Residues in the eggs of the Osprey in the North-eastern United States and their relation to nesting success». J. Appl. Ecol. (British Ecological Society) 3 ((Suppl.)): 87–97. JSTOR2401447. doi:10.2307/2401447.
Ames, P (1966). «DDT Residues in the eggs of the Osprey in the North-eastern United States and their relation to nesting success». J. Appl. Ecol. (British Ecological Society) 3 ((Suppl.)): 87–97. JSTOR2401447. doi:10.2307/2401447.