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1كتاب
المساهمون: Kovalev, Roman Viktorovich., Institut pochvovedenii͡a i agrokhimii (Akademii͡a nauk SSSR), International Congress of Soil Science (11th : 1978 : Canada)
مصطلحات موضوعية: Baĭkalo-Amurskai͡a magistralʹ -- Congresses., Soils -- Russia (Federation) -- Siberia -- Congresses., Railroads -- Environmental aspects -- Russia (Federation) -- Siberia -- Congresses.
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2كتاب
المساهمون: Institut pochvovedeni︠i︡a i agrokhimii (Akademi︠i︡a nauk SSSR), International Congress of Soil Science (11th : 1978 : Canada), Kovalev, Roman Viktorovich