K. U. Kramer · 5 obras en el catálogoObrasPPteridophytes and GymnospermsPteridophytes and GymnospermsTThe Lindsaeoid ferns of the old world v.The Lindsaeoid ferns of the old world v.TTwo new species of ferns from SurinameTwo new species of ferns from SurinameSSynaptospory : a hypothesisSynaptospory : a hypothesisTThe lindsaeoid ferns of the old world IIIThe lindsaeoid ferns of the old world III