Housner, George W.
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Buku Teks
Way, Lawrence W.
California Lange Medical Publ., 1983
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Landell, Olaf J.
De Boekerij, 1966
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Beer, Lawrence Ward
School of Law University of Maryland, 1978
Buku Teks
Lorsch, Jay W.
Homewood, IL. Richard D. Irwin 1972,
Buku Teks