Muravʹi i zashchita lesa : materialy 5-go Vsesoi︠u︡znogo simpoziuma po ispolʹzovanii︠u︡ muravʹev dli︠a︡ borʹby s vrediteli︠a︡mi lesa = [Ants and the protection of forests : papers of the 5th symposium - Arnolʹdi, K. V. (Konstantin Vladimirovich), 1901-1982 ([s.n.], 1975)