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is
?:duplicate
of
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?:linkContext
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-
On the theory and practice of obtaining unbiased and efficient samples in social surveys : Prepared under a grant from the U. S. Dept. of Health, Education and Welfare
(xsd:string)
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?:linkScore
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?:mainEntity
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?:name
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-
On the theory and practice of obtaining unbiased and efficient samples in social surveys : Prepared under a grant from the U. S. Dept. of Health, Education and Welfare
(xsd:string)
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?:toSource
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rdf:type
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