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100   $a20171104d1963      ua             0
101 0 $aeng
135   $aurun||||a|a||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 00$aComparison of two vision-testing devices $ea study to compare visual acuity as measured by the sight-screener and the Sloan letter chart
210  1$aWashington, D.C. :$cU.S. Department of Health, Education, and Welfare, Public Health Service,$d1963.
215   $a1 online resource (4 unnumbered pages, 33 pages) $cillustrations
225 1 $aVital and health statistics. Series 2, Data evaluation and methods research ;$vnumber 1
225 1 $aPublic Health Service publication ;$vno. 1000-series 2-no. 1
300   $a"June 1963."
320   $aIncludes bibliographical references (page 16).
517   $aComparison of two vision-testing devices 
606   $aOptometry$zUnited States
606   $aVision$xTesting
606   $aOptometry$2fast
615  0$aOptometry
615  0$aVision$xTesting.
615  7$aOptometry.
712 02$aUnited States.$bPublic Health Service.
712 02$aNational Center for Health Statistics (U.S.),
801  0$bOCLCE
801  1$bOCLCE
801  2$bOCLCO
801  2$bOCLCA
801  2$bOCLCQ
801  2$bGPO
906   $aBOOK
912   $a9910713634203321
996   $aComparison of two vision-testing devices$93541616
997   $aUNINA