Gourlay, H. R <br/><br/>
Useful graphs and charts :   being an explanation of the principles of business graphics and an outline of the nature, construction and interpretation of graphs and charts as an aid to business management / 
H R Gourlay 
 - Sydney :  Rydge's Business Journal,  c1939 
 - 149 p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business--Graphic methods
<br/><br/><label>Dewey Class. No.: </label>650.0212  / GOU 1939