@ARTICLE{Frąk_Magdalena_Escherichia_2013, author={Frąk, Magdalena}, number={No 19}, journal={Journal of Water and Land Development}, howpublished={online}, year={2013}, publisher={Polish Academy of Sciences; Institute of Technology and Life Sciences - National Research Institute}, title={Escherichia coli as a potential indicator of Biebrza River enrichment sources / Escherichia coli jako potencjalny wskaźnik wzbogacania wód rzeki Biebrzy}, URL={http://www.journals.pan.pl/Content/90051/mainfile.pdf}, }