Ray, William Samuel,  1917- <br/><br/>
An introduction to experimental design / 
William Samuel Ray. 
 - New York :  Macmillan,  c1960. 
 - 254 p. :  illus. ;  25 cm. 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Experimental design.
<br/><br/><label>Dewey Class. No.: </label>501.8  / RAI 1960