JANSSON, H.; MÄNTYLAHTI, V.; NÄRVÄNEN, A. Phosphorus content of ditch sediments as indicator of critical source areas (Research Note). Agricultural and Food Science, [S. l.], v. 9, n. 3, p. 217–222, 2000. DOI: 10.23986/afsci.5662. Disponível em: https://journal.fi/afs/article/view/5662. Acesso em: 23 nov. 2024.