Burby, William Edward, 1893-
West Publishing, 1954
Buku Teks
Moynihan, Cornelius J.
West Publishing, 1962
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Cunningham, Roger A.
West Pub., 1993
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Freyermuth, R. Wilson
Thomson/West, 2011
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Lawson, F.H.
Clarendon Press, 1958
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