01610oam 2200469I 450 991071345220332120200427135829.0(CKB)5470000002501131(OCoLC)1117765905(EXLCZ)99547000000250113120190909d1923 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierInfluence of ribs on strength of spars /by L. Ballenstedt[Washington, D.C.] :National Advisory Committee for Aeronautics,1923.1 online resource (18 pages, 6 unnumbered pages) illustrationsTechnical notes / National Advisory Committee for Aeronautics ;No. 139"May 1923.""From Technische Berichte, Vol. III, No. 4.""Translated by National Advisory Committee for Aeronautics"--Page 18.No Federal Depository Library Program (FDLP) item number.Includes bibliographical references.AirplanesWingsStruts (Engineering)AirplanesWingsfastAirplanesWings.Struts (Engineering)AirplanesWings.Ballenstedt L.1403856United States.National Advisory Committee for Aeronautics,TRAALTRAALOCLCOOCLCFGPOBOOK9910713452203321Influence of ribs on strength of spars3477297UNINA00572nam 2200205zu 450 991086529650332120240625132547.09781787359819(CKB)32331752200041(EXLCZ)993233175220004120240625|2023uuuu || |engur|||||||||||Brian Simon and the Struggle for EducationUCL Press20239781787359826 Gary McCulloch8819129910865296503321Brian Simon and the Struggle for Education4168835UNINA