Sheldon, B. (1994). SONG RATE AND FERTILITY IN THE CHAFFINCH.
Chicago-čujuhus (17. p.)Sheldon, B. SONG RATE AND FERTILITY IN THE CHAFFINCH. 1994.
MLA-čujuhus (9. p.)Sheldon, B. SONG RATE AND FERTILITY IN THE CHAFFINCH. 1994.
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