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Persoon,J.G.M., F.J.H.van Dilst, a.oth.: The African species of Landolphia P.Beauv. Series of revisions of Apocynaceae,XXXIV. 1992. (Wageningen Agricultural Univ.Papers,92-2).45 plates (=line-drawings). 50 maps.232 p.gr8vo.Hardcover.(50062) 77.04
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