Gronlund, Norman E. <br/><br/>
Economics and commerce  the sources of information and their organisation 
Arthur Maltby 
 - New York  MacMillan  c1965 
 - xii,420p.:  ill.;  24cm 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0065012726 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational tests and measurements.