Leslie George Humphrys;  <br/><br/>
Science through experience 

 - London   Blond  1969 
 - 128p  23cm 
 - 1 .
<br/><br/><label>Subjects--Uniform Titles: </label><br/> Science.
<br/><br/><label>Dewey Class. No.: </label>500 H927s