NASA space science vision missions / 
edited by Marc S. Allen. 
 - Vriginia :  American Institute of Aeronautics and Astronautics,  2008. 
 - xix, 434 p. :  ill. ;  24 cm. 
 - Progress in astronautics and aeronautics ;  vol. 224. .
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>9781563479342  RM439.82 1563479346 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Outer space--Exploration--United States.