Journal of the Kansas Entomological Society
Forty species of native bees were collected on safflower blossoms in South Central Arizona, but populations were not large and native bees could only be considered supplemental to honey bees as pollinating agents.
Butler, George D. Jr.; Werner, Floyd G.; and Levin, Marshall D., "Native Bees Associated with Safflower in South Central Arizona" (1966). Bu. Paper 54.
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