Abstract
JOHNSON, D. J. 1978. Age-related breeding biology of the redhead duck in southwestern Manitoba. M.S. Thesis, Tex. A&M Univ., College Station. 47pp. LOKEMOEN, J. T. 1966. Breeding ecology of the redhead in western Montana. J. Wildl. Manage. 30:668-681. NUDDS, T. D. 1980. Canvasback tolerance of redhead parasitism: an observation and an hypothesis. Wilson Bull. 92:414. OLSON, D. P. 1964. A study of canvasback and redhead breeding populations, nesting habitats, and productivity. Ph.D. Thesis, Univ. Minnesota, Minneapolis. 100pp. SNEDECOR, G. W., AND W. G. COCHRAN. 1980. Statistical methods. 7th ed. Iowa State Univ. Press, Ames. 507pp. SUGDEN, L. G. 1980. Parasitism of canvasback nests by redheads. J. Field Ornithol. 51:361-364. WELLER, M. W. 1956. A simple field candler for waterfowl eggs. J. Wildl. Manage. 20:111-113.
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