Freedman, Paul <br/><br/>
Principles of scientific research / 
by Paul Freedman 
 - Washington :  Public affairs,  1950. 
 - 222p. :  diagrs. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research.
<br/><br/><label>Dewey Class. No.: </label>507.2  / FRE.P