Contopoulos, G. <br/><br/>
The Spiral Structure of Our Galaxy 

 - Dordrecht:  Reidel Publishing Company  1970 
 - 478p. :   il; 24 cm. 
<br/><br/> Symposium nº 38 of the International Astronomical Union held in Basel, Switzerland on August 29-September 4, 1969 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomía<br/>spiral structure<br/>estructura espiral<br/>observaciones<br/>galaxia