Johnson, Palmer O.  <br/><br/>
Statistical methods in research. 
/ by Palmer O. Johnson. 
 - New York :  Prentice-Hall,   1949. 
 - xvi, 377 p. :  diagrs ;   24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical statistics; Research; Probabilities.
<br/><br/><label>Dewey Class. No.: </label>311.2 JOH