LEADER 01514aam  2200421I  450 
001 9910711224603321
005 20151113033703.0
024 8 $aGOVPUB-C13-ff8dc22d75e66f29ebdb2bb2085ee683
035   $a(CKB)5470000002481778
035   $a(OCoLC)929066506
035   $a(EXLCZ)995470000002481778
100   $a20151113d1983      ua             0
101 0 $aeng
181   $2rdacontent
182   $2rdamedia
183   $2rdacarrier
200 10$aSize of letters required for visibility as a function of viewing distance and observer visual acuity /$fGerald L. Howett
210  1$aGaithersburg, MD :$cU.S. Dept. of Commerce, National Institute of Standards and Technology,$d1983.
215   $a1 online resource
225 1 $aNBS technical note ;$v1180
300   $a1983.
300   $aContributed record: Metadata reviewed, not verified. Some fields updated by batch processes.
300   $aTitle from PDF title page.
320   $aIncludes bibliographical references.
606   $aLettering
606   $aVisual acuity
615  0$aLettering.
615  0$aVisual acuity.
700   $aHowett$b Gerald Leonard$f1931-$01402680
701   $aHowett$b Gerald Leonard$f1931-$01402680
712 02$aUnited States.$bNational Bureau of Standards.
801  0$bNBS
801  1$bNBS
801  2$bGPO
906   $aBOOK
912   $a9910711224603321
996   $aSize of letters required for visibility as a function of viewing distance and observer visual acuity$93527808
997   $aUNINA