TY  - BOOK
AU  - Collinge,Robert A.
AU  - Ayers, Ronald M.
TI  - Economics by design: principles and issues 
SN  - 0133737888
AV  - HB171.5  .C64 1997
PY  - 1978///
CY  - New Jersey
PB  - Prentice-Hall
KW  - Economics
ER  -