Institut pochvovedeni︠i︡a i agrokhimii (Akademi︠i︡a nauk SSSR), Kovalev, R. V., & Ilʹin, V. B. (1971). Plodorodie pochv Novosibirskogo Priobʹ︠i︡a: Sbornik stateĭ. Nauka, Sib. otd-nie.
Lua i Stíl Chicago (17ú heag.)Institut pochvovedeni︠i︡a i agrokhimii (Akademi︠i︡a nauk SSSR), Roman Viktorovich Kovalev, agus V. B. Ilʹin. Plodorodie Pochv Novosibirskogo Priobʹ︠i︡a: Sbornik Stateĭ. Novosibirsk: Nauka, Sib. otd-nie, 1971.
Lua MLA (8ú heag.)Institut pochvovedeni︠i︡a i agrokhimii (Akademi︠i︡a nauk SSSR), et al. Plodorodie Pochv Novosibirskogo Priobʹ︠i︡a: Sbornik Stateĭ. Nauka, Sib. otd-nie, 1971.
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