Hubert, Lester F.
Blaisdell Pub. Co., 1967
Buku Teks
Vaeth, J. Gordon
The Ronald Press, 1965
Buku Teks
Ahrens, C. Donald, author
Thomson, Brooks/Cole, 2007
Buku Teks
Baar, James, 1929-
Harcourt, Brace & World, c1962
Buku Teks
Springer New York, 2019
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