Gracey, W <br/>
         Evaluation of a moving-map instrument display in landing approaches with a helicopter. [NASA TN D-3986] 
 / William Gracey, Robert W. Sommer and Don F. Tibbs 
 .- Washington, D. C: NASA,  1967 
 .- 21p. 
.- ( National Aeronautics and Space Administratio (NASA)   
<br/><u>Subject Headings:</u> <br/>Navigation;
<br/><U>Author Added Entry: </u><br/> Sommer, R. W;<br/> Tibbs, D. F. ;
<br><U>Copy Details:</u><br> Acc. No.: <b>TR69723(E)</b>, Full Call No.: NASA TN D-3986,   Item type:  Technical Report , Location: COMPACT STORAGE (BASEMENT), <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>