University Oxford Press , 1984"
Buku Teks
Latchman, David S., author
Taylor and Francis, 2006
Buku Teks
MacLean, Alistair
Collins , 1962
Buku Teks
Ullmann, Manfred, author
Edinburgh University Press, 1978
Buku Teks
Stuart MacNeill, editor
[, Springer], 2012
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