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9Published 1994“...HD 75.6 .T737...”
Book -
10Published 1994“...HD 75.6 .I61...”
Conference Proceeding Book -
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12Published 1992“...HD 75.6 .S964...”
Book -
13Published 1990“...HC 681 .Z9 .E5 .R336...”
Conference Proceeding Book -
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15
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17Published 1992“...HD 75.6 .M2352...”
Book -
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20