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Lehrbuch der Zoologie - Hertwig, Richard Karl Wilhelm Theodor von Sir Richard Karl Wilhelm Theodor von Hertwig 1850 -1937 (G. Fischer, 1910)

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List of vertebrated animals living in the gardens of the Zoological Society of London - Sclater, Philip Lutley, 1829 -1913 (Printed for the Society, 1866)

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The London and Edinburgh philosophical magazine and journal of science (Richard and John E. Taylor, 1835)

The London and Edinburgh philosophical magazine and journal of science (Richard and John E. Taylor, 1836)

The London, Edinburgh and Dublin philosophical magazine and journal of science (Taylor & Francis, 1846)

The London, Edinburgh and Dublin philosophical magazine and journal of science (Taylor & Francis, 1849)

The London, Edinburgh and Dublin philosophical magazine and journal of science (Taylor & Francis, 1866)