Briggs, Milton. <br/><br/>
Textbook of economics / 
by Milton Briggs and Percy Jordan. 
 - [8th ed.] / rev. by R.A. Mackness.  [8th ed.] / rev. by R.A. Mackness. 
 - London :  University Tutorial Press,  [1965] 
<br/><br/> First published in this ed. in 1961. 
<br/><br/>Bibliography: p. 578.