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Мамонтов, Владимир Григорьевич. Почвоведение [электронный ресурс]: Справочное пособие Учебное пособие: Учебное пособие / В. Г. Мамонтов. — 1. — Москва: Издательство "ФОРУМ", 2016 — 368 с. — ВО - Бакалавриат. — <URL:https://znanium.com/catalog/document?id=222370>. — <URL:https://znanium.com/cover/0538/538671.jpg>.
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