Artikel Jurnal
Hojjat Adeli; Ana Maria Correia; Luís Paulo Reis; Álvaro Rocha; Marcelo Mendonça Teixeira
Springer, 2016
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UNDP
UNDP , 2001
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Molyneux, Robert E., author
Libraries Unlimited, 2003
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Lamanna, Mary Ann, author
Wadsworth and Cengage Learning, 2011
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