IRScNB_P5535_025214X_39-part-2.pdf
Verlinden, L. & Decleer, K. 1987.
The Hoverflies (Diptera, Syrphidae) of Belgium and their faunistics: Frequency, distribution, phenology.
Vol. 39
irscnb_p5535_025214x_39-part-2-red.pdf
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