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  1. By: Robinson, Harold Ernest, - Skvarla, John
    Type: Article
    In: Journal of Hymenoptera research
    Volume: 38
    Date: 2014
    Page Range: 1-13
    Publication Info: Washington, D.C International Society of Hymenopterists
    Subjects: Asteraceae  Compositae  Oocephala  pantoporate pollen  Polydora
  2. By: Robinson, Harold Ernest, - Skvarla, John - Funk, V. A. (Vicki Ann),
    Type: Article
    In: PhytoKeys
    Volume: 60
    Date: 2016
    Page Range: 49-126
    Publication Info: Sofia, Bulgaria Pensoft Publishers [2010]-
    Subjects: Asteraceae  Baccharoides  Bothriocline  Botswana  Compositae  Cyanthillium  Distephanus  Erlangea  Ethulia  Gymnanthemum  Hilliardiella  Lesotho  Namibia  Namibithamnus  new combinations  new genera  Oocephala  Orbivestus  Parapolydora  Pollen  Polydora  Pseudopegolettia  South Africa  Swaziland  Vernonella  Vernonia  Vernoniastrum  Vernonieae