The Seven Great Questions of Systematic Biology : An Essential Foundation for Conservation and the Sustainable Use of Biodiversity Author ( s ): Joel Cracraft Source : Annals of the Missouri Botanical Garden , Vol . 89 , No . 2 ( Spring , 2002 ), pp . 127

Cracraft, J. (2017). The Seven Great Questions of Systematic Biology : An Essential Foundation for Conservation and the Sustainable Use of Biodiversity Author ( s ): Joel Cracraft Source : Annals of the Missouri Botanical Garden , Vol . 89 , No . 2 ( Spring , 2002 ), pp . 127. Missouri Botanical Garden, 89(2), 127–144.