Heiskanen, Juha Hydrological Properties of Peat-based Growth Media : The Finnish Forest Research Institute, Research Papers 524 / Juha Heiskanen. -- 1.Edit. -- Suonenjoki : The Finnish Forest Research Institute, 1994. -- prer. str.: obr., tab. -- ISBN 951-40-1391-3. -- ISSN 0358-4283
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