@article{Drab:2010,
author
=
"M.Drab and A.Greinert",
title
=
"Changes in the quantity of potassium marked in post-mining grounds in the Łęknica Region",
journal
=
"Civil and Environmental Engineering Reports : University of Zielona Góra Press ; Zielona Góra",
volume
=
"no 4",
pages
=
"19--28",
year
=
"2010",
}