Wallace، Alfred Russel (1876). The Geographical Distribution of Animals. With a Study of the Relations of Living and Extinct Faunas as Elucidating the Past Changes of the Earth's Surface. Vol. 1Vol. 2. New York: Harper and Brothers. OCLC:556393. {{استشهاد بكتاب}}: روابط خارجية في |عنوان= (مساعدة)
Wallace، Alfred Russel (1876). The Geographical Distribution of Animals. With a Study of the Relations of Living and Extinct Faunas as Elucidating the Past Changes of the Earth's Surface. Vol. 1Vol. 2. New York: Harper and Brothers. OCLC:556393. {{استشهاد بكتاب}}: روابط خارجية في |عنوان= (مساعدة)