Reference:Straw1963a
Verbatim text: Straw, R. M. 1963. Bee-fly pollination of Penstemon ambiguus. Ecology 44: 818–819.
Author: Straw, R.M.
Year: 1963
Title: Bee-fly pollination of Penstemon ambiguus
Journal: Ecology
Volume: 44
Pages: 818–819