Artikel Jurnal
Thorne, W.J., author
Oxford University Press , 1948
Buku Teks
Bradford, Frederick A., author
Longmans, Green, 1932
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Rodgers, Raymond, author
Alexander Hamiltion Institute, 1962
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Indonesian Center for Biotechnology and Biodiversity Research and Development (UNS), 2010
Majalah, Jurnal, Buletin