1. Mineau, P., P.J. Sheehan and A. Baril. 1987 Pesticides and wa terfowl on the Canadian prairies A pressing need for research and monitoring In A W Diamond and F L Filion, eds, The Value of Birds Proceedings, 19th World Conference of the In ternational Council for Bird Preservation, June 1986, Kingston, Ontario ICBP Technical Publication No 6 Cambridge, UK, pp 133-147
2. Note on the disappearance of dead grass hoppers from sites of application of control measures;Putnam;Can En tomol,1947
3. Nestling diets of prairie passerine birds at Matador, Saskatchewan, Canada;Maher;Can En tomol,1979
4. Nestling foods and foraging patterns in the clay colored sparrow;Knapton;Wilson Bull,1980