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Page 306 - Gabelman WH (1956) The effect of distance and direction on cross-pollination in onions. Proc Am Soc...
Page 300 - Sex attraction in Andrena flavipes Panzer (Hymenoptera: Apidae), with some observations on nest-site restriction. Proc. R. ent. Soc. Lond. (A) 40, 77-80. 11.8 BUTLER, CG (1966) The effects of extracts of various social insects on queen rearing and the development of workers' ovaries in the honeybee (Apis mellifera).
Page 305 - Fry, G. (1995) Foraging activity of bumblebees (Bombus) in relation to flower resources on arable land.
Page 306 - W., Schultz, U. and Radle, M. (1994) Use of the Tubingen mix for bee pasture in Germany. In: Matheson, A.
Page 304 - DeGrandi-Hoffman, G. & Martin, JH (1993). The size and distribution of the honey bee (Apis mellifera L.) crosspollinating population on male-sterile sunflowers (Helianthus annus L.).
Page 305 - Dramstad, WE 1996. Do bumblebees (Hymenoptera: Apidae) really forage close to their nests? Journal of Insect Behavior 9 (2): 163-182.
Page 299 - Merritt, SJ (1988) Bombus spp. (Hymenoptera: Apidae) as pollinators of male-sterile upland cotton on the Texas high plains.
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Ecology Letters - 2004 - Ecology Letters
Alexandra-Maria Klein, Bernard E Vaissičre, James H Cane, Ingolf Steffan-Dewenter, Saul A ... - 2007 - Proceedings of the Royal Society B: Biological Sciences
Peter G Kevan, Truman P Phillips
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Jaboury Ghazoul - 2005 - Trends in Ecology & Evolution
Crop Pollination by Bees. ks Delaplane & df Mayer, 2000
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: Global Dependence of Human Livelihoods on Pollinators: Refining ...