Siva Prasanna Krishnan,  <br/><br/>
The lighthouse and fresnel lens   men of the sea 

 - 22 pages :   colour illustrations ;   26 cm 
 - Science in action series .
 - Science in action series .
<br/><br/><label>ISBN: </label>9832571952 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Children's stories, English
<br/><br/><label>Dewey Class. No.: </label>823