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1Published 1982“...HF 5411 .A479...”
Conference Proceeding Journal -
2
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3Published 1931“...HD 9275 .N51 .N277...”
Conference Proceeding Journal -
4Published 1988“...HC 683.5 .Z9 .E5 .C758...”
Conference Proceeding Journal -
5Published 1991“...HC 681 .A1 .S726...”
Conference Proceeding Journal -
6