TY  - BOOK
AU  - Helliwell,John F.
TI  - How much do national borders matter?
SN  - 0815735545
PY  - 1998///
CY  - Washington, D.C.
PB  - Brookings Institution
KW  - Interstate commerce
KW  - Canada
KW  - United States
KW  - Boundaries
KW  - Commerce
ER  -