Sitwell, J. A. <br/><br/>
An introduction to positive economics :  workbook / 
J.A. Sitwell and Richard G. Lipsey. 
 - 2nd ed. 
 - [London] :  English Language Society,  1967. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics -- Handbooks, manuals, etc.--Economics -- Handbooks, manuals, etc.