Stapf, Helmut
"Leipzig: Edition, 1967",
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"Pacific Grove: Brooks/Cole Publishing Company, 1998",
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Golden, Sidney
"Massachusetts: Addison-Wesley, 1961",
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Gilrearth, Esmarch S., author
McGraw-Hill, 1958
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Williams, David A., author
Lippincott Williams & Wilkins, 2002
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