Ramachandran Nair , C G : Thampan , M R Ed. <br/><br/>
India Bahirakasha Sakthi(M) 

 - 3 ed. 
 -  Priyadarsini Publications Society,  2011 
 - 115p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Universe-- Descriptive astronomy
<br/><br/><label>Dewey Class. No.: </label>523.1RAM-I