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n4cornell.
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isa:282707995
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prov:value
(a) The Secretary shall, in the year 1980 and every 10 years thereafter, take a decennial census of population as of the first day of April of such year, which date shall be known as the 'decennial census date', in such form and content as he may determine, including the use of sampling procedures and special surveys. 13 U.S.C. 141(a).
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n4:edu
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isa:282707995