Eckersten, H. (1985). Willow growth as a function of climate, water and nitrogen. Swedish University of Agricultural Sciences, Dept. of Ecology and Environmental Research.
Chicago-referens (17:e uppl.)Eckersten, Henrik. Willow Growth as a Function of Climate, Water and Nitrogen. Uppsala: Swedish University of Agricultural Sciences, Dept. of Ecology and Environmental Research, 1985.
MLA-referens (8:e uppl.)Eckersten, Henrik. Willow Growth as a Function of Climate, Water and Nitrogen. Swedish University of Agricultural Sciences, Dept. of Ecology and Environmental Research, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.