Iubileĭnai︠a︡ sessii︠a︡ Akademii nauk, SSSR
by V. L. Komarov, Akademii︠a︡ nauk SSSR
Learning and scholarshipAkademii︠a︡ nauk SSSR
Writing a summary for young readers…
For young readers
Book data: Open Library
by V. L. Komarov, Akademii︠a︡ nauk SSSR
Book data: Open Library