Harvey, J. Perry. <br/><br/>
Let's find out. 

 - London :  Evans,  [1954?]- 
<br/><br/>Book 1. Things around us -- Book 2. About other people's jobs -- Book 3. Inventions and inventors -- Book 4. Nature's wonderful laws. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science -- Juvenile literature.--Science -- Juvenile literature.