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1Published 1992“...HN 400 .M6 .V645...”
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2Published 1989“...HN 398 .S4 .S431 1987-88...”
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3Published 1990“...HN 398 .S4 .S431...”
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4Published 1998“...HN 425 .U72...”
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5Published 1992“...HQ 1662 .W8722...”
Conference Proceeding Book