Introductory economics
Gordon, Sanford Daniel.
Dawson, George Glenn.
Robbins, Philip Porter.
Witchel, Jess.
Lexington [Mass.] [Farnborough] D.C. Heath,
1972
Title page imprint: London
Previous ed. published as 'The American economy'/ by Gordon, Dawson and Witchel. Lexington: D.C. Heath, 1969
Economics.