Authors
Nicola Saino, Stefano Calza, Anders pape Moller, Immunocompetence of Nestling Barn Swallows in Relation to Brood Size and Parental Effort, Journal of Animal Ecology, Vol. 66, No. 6 (Nov., 1997), pp. 827-836
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Saino et al. (1997) studied this question.
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