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Hoover Institution Press, 1996
Buku Teks
3475, 1979
Buku Teks
edited by Frank J. Ayd, Jr. and Irving J. Taylor
Ayd Medical Communications, 1978
Buku Teks
Heller, Jack
Law School of Harvard University, 1963
Buku Teks
edited by Richard M. Bird and Milka Casanegra de Jantscher
International Monetary Fund, 1992
Buku Teks