Ischeznovenie dvukh stepnykh gryzunov, surka i slept͡s︡a, v Penzenskoĭ gubernii
By: I.I. Sprygin.
Series: Trudy po izuchenii͡u︡ zapovednikov
Publisher: Izd. Otdela okhrany prirody Glavnauki NKP
Published: 1925
Place of publication: Moskva
Language: rus
Number of pages: 20
Description: Summery in German.