Proceedings on stellar chromospheres(Washington  1972) <br/><br/>
Stellar chromospheres   
ed. by S. D. Jordan and E. H. Avrett 
 - Washington, D.C.  National Aeronautics and Space Administration  1973 
 - ix, 318p. 
<br/><br/><label>Dewey Class. No.: </label>523  / N73;1