“PREFACE.” The Crossley ID Guide: Eastern Birds, by Richard Crossley, Princeton University Press, Princeton, New Jersey; Woodstock, Oxfordshire, 2011, pp. 5–5, www.jstor.org/stable/j.ctt2tt8g0.3. Accessed 31 July 2021.
Crossley, R. (2011). PREFACE. In The Crossley ID Guide: Eastern Birds (p. 5). Princeton, New Jersey; Woodstock, Oxfordshire: Princeton University Press. Retrieved July 31, 2021, from http://www.jstor.org/stable/j.ctt2tt8g0.3
Crossley, Richard. "PREFACE." In The Crossley ID Guide: Eastern Birds, 5. Princeton, New Jersey; Woodstock, Oxfordshire: Princeton University Press, 2011. Accessed July 31, 2021. http://www.jstor.org/stable/j.ctt2tt8g0.3.
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