Johnson, Rossall James, 1917-, author
[publisher not identified], [date of publication not identified]
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Miner, John B., author
Macmilan, 1977
Buku Teks
Yoder, Dale, author
Prentice-Hall, 1962
Buku Teks
Monappa, Arun
Tata McGraw-Hill, 1985
Buku Teks
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