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200 10$aProtecting and improving Social Security $eenhancing Social Security to strengthen the middle class : hearing before the Subcommittee on Social Security of the Committee on Ways And Means, U.S. House of Representatives, One Hundred Sixteenth Congress, first session, March 12, 2019
210  1$aWashington :$cU.S. Government Publishing Office,$d2020.
215   $a1 online resource (iii,110 pages) $cillustrations
300   $aAccess ID (govinfo): CHRG-116hhrg36239.
300   $a"Serial no. 116-11."
320   $aIncludes bibliographical references.
517   $aProtecting and improving Social Security 
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606   $aMiddle class$zUnited States$xEconomic conditions
606   $aSocial security$zUnited States$xFinance
606   $aSocial security$zUnited States$xForecasting
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200 10$aScience fair projects about planet Earth /$fRobert Gardner
210  1$aNew York :$cEnslow Publishing,$d2017.
210  4$d?2017
215   $a1 online resource (48 pages) $ccolor illustrations, maps
225 1 $aHands-on science
311   $a0-7660-8219-9 
320   $aIncludes bibliographical references and index.
327   $aThe shape of planet Earth -- More evidence of a round Earth -- Let's look inside Earth -- How do Earth's layers differ? -- Continents on the move -- What makes continents move? -- When Earth's plates separate -- More plate movements -- Effects of an earthquake -- Magma and volcanoes.
330   $aThis book features experiments that will help readers unlock the secrets of planet Earth, including why Earth has layers, how continents move, and how we know Earth is round. 
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