TY  - BOOK
AU  - O'Sullivan,Arthur
AU  - Sheffrin,Steven M.
TI  - Survey of economics: principles and tools 
SN  - 0131439693
AV  - HB171.5 .O843 2005
U1  - 330 22
PY  - 2005///,
CY  - Upper Saddle River, N.J.
PB  - Pearson/Prentice Hall
KW  - Economics
N1  - Includes bibliographical references and index
N2  - The text uses five key principles as the foundation to the study of economics and an active learning approach to help reinforce economic concepts. The principles include: the principle of opportunity cost, the marginal principle, the principle of diminishing returns, the spilover principle and the reality principle
ER  -