Knyazev, V. P. Our Forest Trees: Birch, Oak, and Aspen (Nashi lesnye derevya. Bereza, dub i osina), 1925. In Russian.

Князев В. П.
Наши лесные деревья. Береза, дуб и осина. / [Серия по естествознанию: Библиотека «В помощь школьнику»]. Подобрана и методически обработана О. А. Колесниковой.
Москва : Государственное издательство, 1925.
88 с. : ил. ; 21 см. Мягкая издательская обложка.
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Knyazev, V. P.
Our Forest Trees: Birch, Oak, and Aspen. / [Natural Science Series: "To Help the Schoolchild" Library]. Selected and methodologically processed by O. A. Kolesnikova.
Moscow : Gosudarstvennoe Izdatelstvo (Gosizdat), 1925.
88 pp. : ill. ; 21 cm. Softcover. 

This 1925 volume is a remarkable example of early Soviet pedagogical literature, published during the formative years of the new state's educational system. Part of the popular "To Help the Schoolchild" library, the book serves as an accessible scientific guide to the most iconic trees of the Russian landscape: the birch, the oak, and the aspen. The text provides a deep dive into the internal logic of forest ecosystems, including the arrangement of biological life cycles, the seasonal changes of foliage, and the practical importance of these species in both nature and national economy. Methodically processed by O. A. Kolesnikova, the material is presented through a lens of active observation, encouraging children to engage directly with the natural world during the era of the "labor school" reforms.
Across its 88 pages, the book is enriched with charming period illustrations that detail leaf structures, bark textures, and fruit types, making it a valuable resource for early 20th-century nature study. Published by the State Publishing House (Gosizdat) in the mid-1920s, the work reflects the modernist approach to science communication for youth, stripped of the dry academicism of the Tsarist era in favor of clarity and civic utility. Its modest 21 cm softcover format and ephemeral nature make well-preserved copies from this decade particularly scarce. For bibliophiles, historians of Soviet education, and collectors of early botanical literature, this 1925 Moscow imprint is a vital primary source, documenting the roots of the Soviet environmental and pedagogical tradition.