1. AUB, J. C., L. T. FAIRHALL, A. S. MINOT, and P. REZNIKOFF, 1926. Lead Poisoning. Medicine MonographsVII. Williams and Wilkins, Baltimore.
2. BAGLEY, G. E., L. N. LOCKE, and G. T. NIGHTINGALE. Nov., 1967. Lead poisoning in Canada Geese. Avian Dis. Vol.XI, No. 4, 601–608.
3. BELLROSE, F. C. 1959. Lead poisoning as a mortality factor in water populations. Ill. Nat. Hist. Surv. Bull.27: 1–288.
4. BOWLES, J. H. 1908. Lead poisoning in ducks. Auk.25: 312–313.
5. GRINNELL, G. B. 1901. American Duck Shooting. Forest and Stream Publishing Co., New York, pp. 598–601.