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1
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2Published 1975“...Dept. of Scientific and Industrial Research,...”
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3Published 1976“...Dept. of Scientific and Industrial Research,...”
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4Published 1990“...Dept. of Scientific and Industrial Research,...”
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5
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6Published 1947“...Dept. of Scientific and Industrial Research,...”
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7Published 1947“...Dept. of Scientific and Industrial Research,...”
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8
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9