Syrphid flies in natural grass ecosystems of some areas of the Kraishte region (Bulgaria) (Insecta, Diptera, Syrphidae)
Markova, E
Article
1997
Spixiana
20
73--79
BioStor
German
Mchen, Zoologische Staatssammlung Mchen,
BioStor: https://biostor.org/reference/52781
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