01803oam 2200517 450 991071693200332120211118112937.0(CKB)5470000002526878(OCoLC)1154792856(EXLCZ)99547000000252687820200519d1939 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierTandem air propellers /by E.P. LesleyWashington, [D.C.] :National Advisory Committee for Aeronautics,1939.1 online resource (10 pages, 16 unnumbered pages) illustrationsTechnical note / National Advisory Committee for Aeronautics ;No. 689"February 1939."No Federal Depository Library Program (FDLP) item number.Includes bibliographical references (page 10).Propellers, AerialPropellers, AerialTestingPropellersDesign and constructionPropellers, AerialfastPropellers, AerialTestingfastPropellersDesign and constructionfastPropellers, Aerial.Propellers, AerialTesting.PropellersDesign and construction.Propellers, Aerial.Propellers, AerialTesting.PropellersDesign and construction.Lesley E. P(Everett Parker),1874-1945,1391105United States.National Advisory Committee for Aeronautics,TRAALTRAALOCLCOOCLCFGPOBOOK9910716932003321Tandem air propellers3469474UNINA