Series of revisions of apocynaceae
Leeuwenberg, A.J.M.
Series of revisions of apocynaceae - Wageningen 1987 - No. 87-5; Nederland, Wageninge .
633.913.154
Series of revisions of apocynaceae - Wageningen 1987 - No. 87-5; Nederland, Wageninge .
633.913.154