London, A. and C. Black, 1893-1896.
London, J. Van Voorst, 1871-85.
London: R.H. Porter, 1897.
London :R. H. Porter,1885-1897. | Harvard University, Museum of Comparative Zoology, Ernst Mayr Library Vi
London, sold by R. H. Porter, 1864-1907.
article by Alfred Newton in the 9th edition (1884) of Encyclopædia Britannica
London: [J. Akerman, photo-lithographer], 1880.
entry in Dictionary of National Biography
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