The Hymenoptera collection at the Leibniz Institute for the Analysis of Biodiversity Change (LIB) - Museum Koenig Bonn contains parts of the collection of Johann Klapperich as well as the collections of W. Aerts, Johannes Gallasch, R. Oberthür, August Reichensperger, R. Roesler, A. Schoop and the permanent loan of the Zoo Cologne
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