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List of works by Robert D. Brettell

Studies in the Heliantheae (Asteraceae). II. A survey of the Mexican and Central American species of Simsia

scientific article published in 1972

Studies in the Liabeae (Asteraceae)---II. Preliminary survey of the genera

scientific article published in 1974

Studies in the Senecioneae (Asteraceae). I. A new genus, Pittocaulon

scientific article published in 1973

Studies in the Senecioneae (Asteraceae). II. A new genus, Nelsonianthus

scientific article published in 1973

Studies in the Senecioneae (Asteraceae). III. The genus Psacalium

scientific article published in 1973

Studies in the Senecioneae (Asteraceae). V. The genera Psacaliopsis, Barkleyanthus, Telanthophora and Roldana

scientific article published in 1974

Tribal revisions in the Asteraceae. IX. The relationship of Ischnea

article

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