Ravenstein, E. G. <br/><br/>
Vasco da gamayude yathra  Dairykurippukal / 

 - Thiruvananthapuram :  Chintha Publishers ,  2012. 
<br/><br/> Tr. by Prabha R Chatterjee 
<br/><br/><label>ISBN: </label>8126208104