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    • As partial requirement fulfilment for the Doctorate Degree in plant taxonomy 

      Tjitrosoedirdjo, Sri Sudarmiyati | Guhardja, Edi | Rifai, Mien A. | J.F Veldkamp | Damaedi, Dedy | Rahayu, Gayuh (2000)
      An account of the diversity, distribution, and taxonomy of the Asteraceae in Sumatera is given, There are 133 species of74 genera in 11 tribes, New species are recoqnized in this study, Prenanthes L. (2 species), Senecio ...