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Revision of Heppiella (Gesneriaceae)Lars Peter Kvist · Systematic Botany · 1990

A New Species of Acmanthera (Malpighiaceae)Anderson, William R. · Systematic Botany · 1980

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A Reappraisal of the Oncidioid OrchidsChase, Mark W. · Systematic Botany · 1986

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