Snyder, Donald L.
John Wiley & Sons, 1975
Buku Teks
Keller, Herbert B.
"Waltham, Massachusetts Blaisdell Pub., 1968",
Buku Teks
Keller, Herbert B.
Society for Industrial and Applied Mathematics, 1990
eBooks
Swanson, Earl H.
Pocatello, 1962.
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by Robert L. Hamblin ... [et al.]
Robert E. Krieger, 1978
Buku Teks