Cain, Joseph C. <br/>
       THE GEOMAGNETIC SECULAR VARIATION [NASA TN D-4527] 
 / Joseph C. Cain and Shirley J. Hendricks 
 .- National Aeronautics and Space Administration: Washington, D. C.,  1968 
 .- 221p . 
.- ( National Aeronautics and Space Administration NASA Technical Note   
<br/>Bound vol. contains NASA TN D-4521-4530 
<br/><U>Author Added Entry: </u><br/>Hendricks, Shirley J.;
<br><U>Copy Details:</u><br> Acc. No.: <b>TR014628</b>, Full Call No.: ,   Item type:  Technical Report , Location: COMPACT STORAGE (BASEMENT), NASA TN D-4521-4530<br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>