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Ordering Life: Karl Jordan and the Naturalist Tradition (Johns Hopkins University Press, 2012)

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“Natural history as stamp collecting: a brief history,” Archives of Natural History 34 (2007): 244-258

“Ernst Mayr, Karl Jordan, and the history of systematics,” History of Science 48 (2005): 1-35.

“Type-specimens of birds as sources for the history of ornithology,” Journal of the History of Collections 17 (2005): 173-188.

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“The tailend of the moth: clarifying species boundaries,” Endeavour 28 (2004): 161-166.