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1Published 1981“...HQ 1391 .N5 .W872...”
Conference Proceeding Book -
2Published 1988“...HQ 1121 .R438...”
Conference Proceeding Book -
3Published 1994“...HQ 1236 .W872 w...”
Conference Proceeding Book -
4Published 1997“...HQ 1236.5 .O3 .P117 2nd...”
Conference Proceeding Book -
5
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6Published 2000“...HQ 1236.5 .P16 .S471 2000...”
Conference Proceeding Book