VARIS, E. NPK-lannoituksen vaikutus Pito-perunan satotekijöihin . Agricultural and Food Science, [S. l.], v. 45, n. 5, p. 489–500, 1973. DOI: 10.23986/afsci.72956. Disponível em: https://journal.fi/afs/article/view/72956. Acesso em: 20 may. 2024.