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Comment
. 2001 Oct 19;294(5542):471.
doi: 10.1126/science.294.5542.471a.

Variation in food supply, time of breeding, and energy expenditure in birds

S Verhulst  1 , J M Tinbergen
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Comment

Variation in food supply, time of breeding, and energy expenditure in birds

S Verhulst et al. Science. .
No abstract available

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