LAAKSONEN, K. The effect of climatic factors on the hectare yields of barley, oats and spring wheat in Finland in 1972-77. Fennia - International Journal of Geography, [S. l.], v. 157, n. 2, p. 199–221, 1979. Disponível em: https://fennia.journal.fi/article/view/9179. Acesso em: 22 may. 2024.