A.Yu. Isaev - Key to beetles of Middle Volga region (key to families Gyrinidae and Microsporidae)
A.Yu. Isaev
Key to beetles of Middle Volga region
(Part 1 - Adephaga and Myxophaga)
Ulyanovsk, 2002.
Key to species of the families Gyrinidae and Microsporidae - P. 67-68.
