The solar radiation records of 20 stations in the north-central region were analyzed with the aid of punched cards obtained from the National Weather Service Records Center at Asheville, North Carolina.
Baker, Donald G. and John C. Klink. 1975. Solar radiation reception, probabilities, and areal distribution in the North Central Region. (Saint Paul, MN: University of Minnesota, Agricultural Experiment Station). Technical bulletin no.300.
Baker, Donald G.; Klink, John C..
Solar radiation reception, probabilities, and areal distribution in the north-central region.
Minnesota Agricultural Experiment Station.
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