Helliwell, John F. <br/><br/>
How much do national borders matter? / 
John F. Helliwell. 
 - Washington, D.C. :  Brookings Institution,  1998 
 - 155 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0815735545  RM140.57 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Interstate commerce--Canada.<br/>Interstate commerce--United States.<br/>Boundaries.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Canada--Commerce.<br/>United States--Commerce.<br/>Canada--Commerce--United States.<br/>United States--Commerce--Canada.