Title page of the book <i>Die Ichneumonen der Forstinsecten in forstlicher und entomologischer Beziehung</i> (vol. 3, 1852) by Julius Theodor Christian Ratzeburg
<bdi><a href="https://en.wikipedia.org/wiki/en:Julius_Theodor_Christian_Ratzeburg" class="extiw" title="w:en:Julius Theodor Christian Ratzeburg"><span title="German entomologist (1801–1871)">Julius Theodor Christian Ratzeburg</span></a>
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1852
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