Keya to the insects of the European part of the USSR.
Chicago-čujuhus (17. p.)Keya to the Insects of the European Part of the USSR.
MLA-čujuhus (9. p.)Keya to the Insects of the European Part of the USSR.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.