Science in everyday life :  book III / 
by A. Verstraeten and N. A. Watts. 
 - Calcutta :    Orient longman limited,  1961.  
 - 204 p. :  ill. ;  19 cm. 
<br/><br/><label>Subjects--Index Terms: </label>Science Technology 
<br/><br/><label>Dewey Class. No.: </label>509