edited by W. Gellert, S. Gottwald, M. Hellwich, H. Kastner, H. Kustner
Van Nostrand Reinhold, 1989
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Hutchinson, 1959
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editors, Donald D. Carr, Norman Herz
Pergamon Press, 1989
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Beckett, Kenneth A., author
Grolier International, 1984
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Raymond J. Corsini, editor
Wiley, 1987
Buku Referensi