LEADER 01641oam  2200481   450 
001 9910712860703321
005 20200403104302.0
035   $a(CKB)5470000002497575
035   $a(OCoLC)1105632488
035   $a(EXLCZ)995470000002497575
100   $a20190625d1920      ua             0
101 0 $aeng
135   $aurbn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 14$aThe problem of the helicopter /$fby E.P. Warner
210  1$aWashington, D.C. :$cNational Advisory Committee for Aeronautics,$d1920.
215   $a1 online resource (18 pages, 2 unnumbered pages) $cillustrations
225 1 $aTechnical notes / National Advisory Committee for Aeronautics ;$vNo. 4
300   $a"May, 1920."
300   $aNo Federal Depository Library Program (FDLP) item number.
320   $aIncludes bibliographical reference (page 4).
606   $aHelicopters$xDesign and construction
606   $aHelicopters$xHistory
606   $aHelicopters$xDesign and construction$2fast
606   $aHelicopters$2fast
608   $aHistory.$2fast
615  0$aHelicopters$xDesign and construction.
615  0$aHelicopters$xHistory.
615  7$aHelicopters$xDesign and construction.
615  7$aHelicopters.
700   $aWarner$b Edward Pearson$f1894-1958,$01393953
712 02$aUnited States.$bNational Advisory Committee for Aeronautics,
801  0$bTRAAL
801  1$bTRAAL
801  2$bTRAAL
801  2$bOCLCO
801  2$bGPO
906   $aBOOK
912   $a9910712860703321
996   $aThe problem of the helicopter$93450643
997   $aUNINA