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1Published 1980“...HE 291 .N532 r...”
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5Published 1983“...HD 9502 .N52 .R454...”
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7Published 1981“...HM 535 .F142 1981...”
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9Published 1979“...HT 391 .R3361...”
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18Published 1984“...HB 1323 .A2 .R454...”
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20Published 1988“...HB 141.5 .N277...”
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