Progreesof NASA resarch relatin to noise allleviaton of large subsonic jet aircrafft [NASA SP=189] 
 / National Aeronautics and Space Administration 
 .- Washington, D C.: National Aeronautics and Space Adminstration,  1968 
.- ( National Aeronautics and Space Adminstration   
<br><U>Copy Details:</u><br> Acc. No.: <b>121108 </b>, Full Call No.: ,   Item type:  Technical Report , Location: COMPACT STORAGE (BASEMENT), <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>