1. Significant encounters with banded birds;North Am. Bird Bander,1980
2. Anderson, D. W. and J.J. Hickey. 1972. Eggshell changes in certain North American birds. In K.H. Voous, ed., Proceedings, XV International Ornithology Congress, The Hague, Netherlands, pp. 514-540.
3. Gilbertson, M. and L. Reynolds. 1974. DDE and PCB in Canadian birds, 1969 to 1972. Canadian Wildlife Service Occasional Paper no. 19, pp. 1-17.