The role of Humic Substances in the ecosystem and in enviromental protection : 8th meeting of the International Humic Substances Society September 9-14,1996,Wroclaw,Poland./Abstracts of invited and volunteered papers/. edited by Jerzy Drozd ,Jerzy Weber.
‡aThe role of Humic Substances in the ecosystem and in enviromental protection :
‡b8th meeting of the International Humic Substances Society September 9-14,1996,Wroclaw,Poland./Abstracts of invited and volunteered papers/.
‡cedited by Jerzy Drozd ,Jerzy Weber.
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‡aWroclaw.:
‡mic Substances Society and Agricultural University of Wroclaw ,
‡c1996.