Feeding honeybees pollen and pollen substitutes /
Johansson, T. S. K.(Tage Sigvard Kjell),1919-
Johansson, Mildred P.
International Bee Research Association.
Gerrards Cross : International Bee Research Association,
[1979?]
Caption title.
Reprint from Bee world 58: 105-118, 135, 161-164 (1977).