University of Wisconsin–Madisonimages.library.wisc.edu/EcoNatRes/EFacs/PassPigeon/ppv09...his work...
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University of Wisconsin–Madisonimages.library.wisc.edu/EcoNatRes/EFacs/PassPigeon/ppv09...his work there; Hollister was still there at that time. Later on in Wash- ington, D C.,