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1Published 1980“...HC 623 .W4 .C581...”
Conference Proceeding Book -
2Published 1986“...HC 662.2 .D5985...”
Book -
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14Published 1990“...HT 169 .N52 .W4 .O84...”
Serial -
15Published 1999“...HT 169 .N52 .W4 .W452 o 1999...”
Book -
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