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[Erscheinungsort nicht ermittelbar]: Universität Bremen, Forschungsstelle für Bienenkunde (Bremen), 1993
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Oxford University Press, 2012
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Ovid Technologies (Wolters Kluwer Health), 2002
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PAGEPress Publications, 2017
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IOP Publishing, 2020
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African Journals Online (AJOL), 2015
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Ovid Technologies (Wolters Kluwer Health), 2014
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MDPI AG, 2009
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Springer Science and Business Media LLC, 2001
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Ovid Technologies (Wolters Kluwer Health), 2000
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Elsevier BV, 1999
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Springer Science and Business Media LLC, 2024
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Elsevier BV, 2016
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Ovid Technologies (Wolters Kluwer Health), 2012
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Ovid Technologies (Wolters Kluwer Health), 2008
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Oxford University Press (OUP), 1989