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Buku Teks
edited by Amrei Muller, Hege Elisabeth Kjos
Cambridge University Press, 2017
Buku Teks
Selby, David, author
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Buku Teks
Unesco, 1970
Buku Teks
edited by Ian Brownlie, Guy S. Goodwin-Gill
Clarendon Press, 1971
Buku Teks