@inproceedings{933f5cf999804a049e7d92bfb645dd8c,
title = "Political transformations and nitrogen balances of dairy farms in Poland",
author = "S. Pietrzak and O. Oenema",
year = "2004",
language = "English",
isbn = "9789076998435",
pages = "536--538",
editor = "D.J. Hatch and D.R. Chadwick and S.C. Jarvis and J.A. Roker",
booktitle = "Controlling nitrogen flows and losses",
publisher = "Wageningen Academic Publishers",
address = "Netherlands",
note = "12th nitrogen workshop; University of Exeter (UK) ; Conference date: 21-09-2003 Through 24-09-2003",
}