Earth explorer. 

 - Interactive  1996 
 - 1 computer optical disc  sd. ,col.  4 3/4 in. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth sciences--Research<br/>Geophysics--Observations
<br/><br/><label>Dewey Class. No.: </label>550.7204 EAR 1996