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Caring for Pollinators - Bundesamt für Naturschutz

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WESTRICH, P. (1989): Die Wildbienen Baden-Württembergs. Allgemeiner Teil (I) und<br />

Spezieller Teil (II). Verlag Eugen Ulmer, Stuttgart.<br />

Literature<br />

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41: S. 257 - 286.<br />

WHITTINGTON, A.E. (2003): The Afrotropical Syrphidae fauna: an assessment. -Studia<br />

dipterologica 10(2): 579-607.<br />

WITTMANN, D. RADTKE, R., CURE, J.R. & M.T. SCHIFINO-WITTMANN (1989): Coevolved<br />

reproductive strategies in the oligolctic bee Callonychium petuniae (Apoidea, Andrenidae)<br />

and three purple flowered Petunia species (Solanaceae) in southern Brazil. Z. zool. Syst.<br />

Evolut.-<strong>for</strong>sch., 28: 157 – 165.<br />

WOLTERS, H. E. (1983): Die Vögel Europas im System der Vögel. Biotropic Verlag, Baden-<br />

Baden.<br />

WYNHOFF, I., J. VAN DER MADE & C. VAN SWAAY (1992): Dagvlinders van de Benelux.<br />

Wageningen: de Vlinderstichting. [Farbtafeln zur Bestimmung. Text in Niederländisch,<br />

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189

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