TY  - BOOK
AU  - Silverman, H. A.
TI  - The substance of economics: For the student and the general reader 
U1  - 330   
PY  - 1950///
CY  - London
PB  - Sir Isaac Pitman and Sons, Ltd.
KW  - Economics
KW  - Nature of economics
KW  - Economic system
KW  - Evolution of economic system
ER  -