scholarly article by Stefan Olsson et al published 1984 in Journal of Plant Nutrition and Soil Science
article by Kristina Arnebrant et al published January 1990 in Soil Biology and Biochemistry
article published in 1980
article
artículo científico publicado en 1984
scientific article published in 1987
artículo científico publicado en 1983
article by P.A. Olsson et al published April 1996 in Soil Biology and Biochemistry
article by Anders Nordgren et al published January 1986 in Environmental pollution. Series A, Ecological and biological
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