For correspondence: 634050 Tomsk, Lenin Avenue, 30
Tomsk Polytechnic University Institute of Natural Sources
Geoecology and Geochemistry Department
Lenin Avenue 2/5, building 20, office 536.
Tel. 701-777, ad.2903
Tel./Fax. 41-89-10
Primary e-mail ivanov-13@mail.ru
E-mail: ivanovayu@tpu.ru