Morrison, David <br/><br/>Frontiers of astronomy/ David Morrison.--  -- Philadelphia:  Saunders College Publishing,  1990. <br/>xiv.,  col.: ill.;  25. <br/><br/> Includes index. <br/><br/><label>ISBN: </label>0030303486 <br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy<br/><br/><label>Dewey Class. No.: </label>HS Cir 520.20 M831 1991