@misc{comparison+of+selected+methods+of+industrial+magnesium+sulphate+purification+from+iron+compounds, author = {Jarosiński, Andrzej i Radomski, Piotr}, title = {Comparison of selected methods of industrial magnesium sulphate purification from iron compounds}, address = {Kraków}, publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>}, date = {2011} }