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1Published 1980“...The Survey,...”
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2Published 1980“...The Survey,...”
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3Published 1979“...The Survey,...”
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4Published 1979“...The Survey,...”
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5Published 1979“...The Survey,...”
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6Published 1979“...The Survey,...”
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7Published 1979“...The Survey,...”
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8Published 1984“...The Survey ;...”
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10Published 1986“...The Survey ;...”
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11Published 1987“...The Survey ;...”
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12Published 1987“...The Survey ;...”
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13Published 1986“...The Survey,...”
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14Published 1986“...The Survey,...”
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15Published 1989“...The Survey ;...”
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16Published 1990“...The Survey ;...”
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17Published 1989“...The Survey ;...”
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18Published 1989“...The Survey ;...”
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19Published 1989“...The Survey ;...”
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20Published 1990“...The Survey ;...”
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