Exton, Harold
Chichester Ellis Horwood, 1976
Buku Teks
Exton, Harold, author
Ellis Horwood, 1978
Buku Referensi
edited by Richard A. Askey
Academic Press , 1975
Buku Teks
Heuser, Harro, author
John Wiley & Sons, 1982
Buku Teks
Ernst Thomas
[Ernst Thomas , ], 2012
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