Robertson, G. W. (1983). Weather-based mathematical models for estimating development and ripening of crops. World Meteorological Organization.
Chicago-referens (17:e uppl.)Robertson, G. W. Weather-based Mathematical Models for Estimating Development and Ripening of Crops. Geneva: World Meteorological Organization, 1983.
MLA-referens (8:e uppl.)Robertson, G. W. Weather-based Mathematical Models for Estimating Development and Ripening of Crops. World Meteorological Organization, 1983.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.