Vneshkolʹnye biologicheskie ėkskursii
Subtitle: materialy k teorii i praktike vneshkolʹnykh ėkskursiĭ
By: B.M. Zavadovskiĭ.
Publisher: Gos. izd-vo
Published: 1922
Place of publication: Moskva
Language: rus
Number of pages: 101