T. Elliot Weier ... [and others]
John Wiley & Sons, 1974
Buku Teks
Hole, C.B., author
ELBS and Macmillan Education, 1997
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Sumich, James L., author
Wm.C. Brpwn, 1992
Buku Teks
Daly, Howell V., author
McGraw-Hill, 1978
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Sumich, James L., author
McGraw-Hill, 1999
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