@book {293,
	title = {Kenya trees and shrubs},
	year = {1961},
	publisher = {Buchanan},
	organization = {Buchanan},
	address = {Nairobi},
	author = {Dale, I.R. and Greenway, P.J.}
}
@article {299,
	title = {The functional significance of syncarpy},
	journal = {Phytomorphology},
	volume = {11},
	year = {1961},
	pages = {249-256},
	author = {Carr, S.G.M. and Carr, D.J.}
}
@book {275,
	title = {Woody Plants of Ghana with special reference to their uses},
	year = {1961},
	publisher = {Oxford University Press},
	organization = {Oxford University Press},
	address = {London},
	author = {Irvine, F.R.}
}
@article {258,
	title = {Ecological aspects of flower evolution. II. Zoophilous flower classes},
	journal = {Evolution},
	volume = {15},
	year = {1961},
	pages = {44-59},
	author = {van der Pijl, L.}
}
