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1Published 1981“...The Survey,...”
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2Published 1981“...The Survey,...”
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3Published 1986“...The Survey,...”
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4Published 1986“...The Survey ;...”
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5Published 1986“...The Survey,...”
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6Published 1987“...The Survey,...”
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7Published 1988“...The Survey ;...”
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8Published 1988“...The Survey ;...”
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9Published 1988“...The Survey ;...”
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10Published 1987“...The Survey,...”
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11Published 1988“...The Survey ;...”
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12Published 1988“...The Survey ;...”
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13Published 1988“...The Survey ;...”
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14Published 1988“...The Survey ;...”
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15Published 1988“...The Survey ;...”
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16Published 1988“...The Survey ;...”
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18Published 1991“...The Survey ;...”
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19Published 1995“...The Survey,...”
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20Published 1996“...The Survey,...”
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