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Witoon Youngsa-ad. (2006) Diterpenoids from the roots of Croton oblongifolius Roxb. . Chulalongkorn University/Bangkok.
Witoon Youngsa-ad. Diterpenoids from the roots of Croton oblongifolius Roxb. . Bangkok:Chulalongkorn University, 2006.
Witoon Youngsa-ad. (2006) Diterpenoids from the roots of Croton oblongifolius Roxb. . Chulalongkorn University/Bangkok.