Angel, Myer
[publisher not identified], [date of publication not identified]
Buku Teks
Diebold, John
D> Van Nostrand Company, Inc, 1952
Buku Teks
Kogan, Nathan
Holt, Rinehart and Winston, 1964
Buku Teks
Cohen, Morris R.
Open Court, 1961
Buku Teks
Toyohide Watanabe, editor
[, Springer], 2012
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