"Ornithologist" . "1910-01-10Z"^^ . "1910Z"^^ . "Helmut Sick (10 January 1910 \u2013 5 March 1991), was a German-Brazilian ornithologist.A prominent ornithologist in Brazil, Sick published more than 200 papers, including his most influential work: Ornitologia Brasileira, Uma Introdu\u00E7\u00E3o (1984), later translated into English as Birds in Brazil: A Natural History (1993)."@en . "1991Z"^^ . "Sick, Helmut"@en . "1991-03-05Z"^^ .