NASA  / TN D-1239 <br/>
O'Bryan,Thomas C <br/>
       AN EXPERIMENTAL STUDY OF THE EFFECT OF DOWNWASH FROM A TWIN-PROPELLER VTOL AIRCRAFT ON SEVERAL TYPES OF GROUND SURFACES 
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 .-  Nasa, Washington, D.C.,  1962 
 .- 26 . 
<br/>Bound With Nasa Tn D-1231-1238,1240 
<br><U>Copy Details:</u><br> Acc. No.: <b>TR13008</b>, Full Call No.: NASA TN D-1239,   Item type:  Technical Report , Location: General Stacks, <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>