Osborne, Adam, author
Osborne McGraw-Hill, 1981
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Hogan, Thom, author
[Publisher not identified], 1981
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Singh, Avtar, author
Prentice-Hall, 1989
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Hogenboom, P., author
Elektuur B.V., 1988
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Sawin, Dwight H., author
Lexington Books, 1977
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