00786cam a22002051  4500001001300000003000400013005001700017008004100034010001700075035001900092040004800111050002400159100002000183245013400203260004800337300005000385490010500435650002500540999001500565af 47005049 DLC20260227110829.0800915s1941    fr a          000 0 fre c  aaf 47005049   a(OCoLC)6715160  aMass inst. of technology. LibrarycNICdDLC00aTL502b.F77 no. 1761 aDupleich, Paul.00aRotation par chute libre des ailettes rectangulaires de forme allongée,cpar Paul Dupleich ... Préface de m. Pierre Vernotte.  aParis,bE. Blondel La Rougery [etc.]c1941.  a3 p.l., 75 p.billus. (incl. diagrs.)c27 cm.0 a[France] Secrétariat d'état à l'aviation. Publications scientifiques et techniques ... n 1̊76 0aRotors (Helicopters)  c2917d2917