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1
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2
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3
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4
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5Published 1999Electronic Software Data Set
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6Published 1999Electronic Software Data Set
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7
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8Published 1995Electronic Software Data Set
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9Published 1995Electronic Software Data Set
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10
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11Published 2002Electronic Software Data Set
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12
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13Published 2001Electronic Software Data Set
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14
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15
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16
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17Published 1998Electronic Software Data Set
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18Published 1990Electronic Software Data Set
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19
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20Published 2003Electronic Software Data Set