Zimbalist, Andrew, author
Academic Press, 1984
Buku Teks
The Habibie Center,
Majalah, Jurnal, Buletin
Arnold, H.J.P., author
Dufour Editions, 1966
Buku Teks
edited by Peter Mansfield
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Buku Teks
Halm, George N
Feffer and Simons, 1968
Buku Teks