Douglas W. Mock, Patricia Adair Gowaty, Nancy Burley, Cynthia K. Bluhm, Michael G. Anderson, Frank McKinney, Bruce Beehler, Bertram G. Murray, Jr., Avian Monogamy, Ornithological Monographs, No. 37, Avian Monogamy (1985), pp. iii-vi, 1-121
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Mock et al. (1985) studied this question.
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