Weston, J. Fred (John Fred), 1916-
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Buku Teks
Dauten, Carl Anton, 1913-, author
Prentice-Hall, 1948
Buku Teks
Carlson, Sune, author
Laromedelsforiagen, 1969
Buku Teks
Gordon, Robert Aaron, author
Columbia University Press, 1959
Buku Teks
Betts, R.J.
McGraw-Hill , 1980
Buku Teks