Kohn, Bernice <br/><br/>
The scientific method 

 -  Prentice hall inc,  1964 
 - 72p.;  ill.  22cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural sciences and mathematics
<br/><br/><label>Dewey Class. No.: </label>501.2  / KOH