TY  - BOOK
AU  - Welch, Patrick J.
AU  - Welch, Gerry F. 
TI  - Economics: Theory and practice
SN  - 9780471679462
AV  - HB 171.5.W45 2007 
PY  - 2007///
CY  - New Jersey
PB  - John Wiley & sons
ER  -