TY  - BOOK
AU  - Welch,Patrick J.
AU  - Welch,Gerry F.
TI  - Economics: theory & practice 
SN  - 0030267722
AV  - HB171.5 .W3935 1989
U1  - 330 19
PY  - 1989///
CY  - Chicago
PB  - Dryden Press
KW  - Economics
N1  - Includes bibliographies and index
ER  -