Stetler, David A.
"Minneapolis Burgess, 1974",
Buku Teks
Shellhammer, H. S., author
The National Press, 1965
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Tanner, James T., author
Burgess Publishing, 1970
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Semishin, Vasilii Ivanovich
Peace, [date of publication not identified]
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Robert, Julian L., author
W.H. Freeman, 1991
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