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Luer, Carlyle A.: Icones Pleurothallidinarum. Vol.05: Systematics of Dresslerella and Scaphosephalum. Addenda to Porroglossum.1988.(Monogr. Syst.Bot.Miss.Bot.Gdn.,26) Approx. 44 pls. (line- drawings). distrib.maps. 111 p. gr8vo. Paper bd. (38851) 13.91
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