by Pyka, J. (Inland Fisheries Institute, Olsztyn (Poland))
Published in Archiwum rybactwa polskiego (1999)

by Pyka, J. (Inland Fisheries Institute, Olsztyn (Poland))
Published in Archiwum rybactwa polskiego (1993)

by Pyka, J. (Inland Fisheries Institute, Olsztyn (Poland))
Published in Archiwum rybactwa polskiego (1997)

by Pyka, J. (Inland Fisheries Institute, Olsztyn (Poland))
Published in Archiwum rybactwa polskiego (1996)

by Pyka, J. (Inland Fisheries Institute, Olsztyn (Poland))
Published in Archiwum rybactwa polskiego (1995)

by Pyka, J. (Inland Fisheries Institute, Olsztyn (Poland))
Published in Archiwum rybactwa polskiego (1995)

by Zdanowski, B, Stawecki, K, Pyka, J.,Inland Fisheries Institute, Olsztyn (Poland). Dept. of Hydrobiology, Dunalska, J.,University of Warmia and Mazury, Olsztyn (Poland). Dept. of Environmental Protection Engineering, Hutorowicz, J, Prusik, S.,Inland Fisheries Institute, Olsztyn (Poland). Dept. of Hydrobiology
Published in Archiwum Rybactwa Polskiego = Archives of Polish Fisheries (01.01.2006)

by Pyka, J. (Inland Fisheries Institute, Olsztyn (Poland)), Kolman, R
Published in Archiwum rybactwa polskiego (1997)