Electric heating of honey bee hives - Owens, Charles D., 1921-; Farrar, Clayton Leon, 1904-; Wisconsin. Agricultural Experiment Station, Madison (Washington] U.S. Agricultural Research Service; [for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1967)
Prepared in cooperation with Wisconsin Agricultural Experiment Station.
Bibliography: p. 24.
Keywords: Beehives -- Heating and ventilation; Beehives -- Heating; Electric heating