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Reyes, Alberto V. MacPhee, Ross D.E. Shapiro, Beth (September 2015).
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Extinctions in Near Time: Causes, Contexts, and Consequences.

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C. Wogelius, Roy A. Hidy, Alan J. Buckley, Mike (June 2013).
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Hidy, Alan J. Buckley, Mike (March 5, 2013). "Mid-Pliocene warm-interval deposits in the High Arctic generate insight into camel evolution".
Worboys, Graeme L. Francis, Wendy L. Lockwood, Michael (30 March 2010).

Connectivity Conservation Management: A Global Guide.

Cumming, Valerie Cunnington, CW Cunnington, PE (2010). The
Dictionary of Fashion History. These he commanded to advance in front of his other troops in opposition to
the Lydian horse guiding them ended up to comply with the
foot soldiers, and last of all the cavalry.