Template:Semple & Brouillet, 1980a

• Semple, J.C. & Brouillet, L. 1980. A synopsis of North American Asters: the subgenera, sections and subsections of Aster and Lasallea. American Journal of Botany 67(7): 1010–1026. JSTOR DOI: 10.2307/2442193  
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