Literaturrecherche

Literatur Haneklaus S, Harms H, Klasa A, Nowak M, Schnug E, Wierzbowska J (1997) The content of some macro- and micronutrients in sewage sludges from sewage treatment plants from north-eastern Poland and big polish cities. Zeszyty Problemowe Postepow Nauk Rolniczych:185-190

Literatur Haneklaus S, Harms H, Klasa A, Nowak M, Schnug E, Wierzbowska J (1997) Content of cobalt, molybdenum, titanium, zirconium and vanadium in soil under the condition of agricultural utilization of sewage sludges. Zeszyty Problemowe Postepow Nauk Rolniczych:819-824