Preston, Richard Arthur. <br/><br/>
The defence of the undefended border  planning for war in North America, 1867-1939 /  [electronic resource] : 
Richard A. Preston. 
 - Montreal :  McGill-Queen's University Press,  1977. 
 - xiv, 300 p. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><br/>Electronic reproduction. <br/>Palo Alto, Calif. : <br/>ebrary, <br/>2011. <br/>Available via World Wide Web. <br/>Access may be limited to ebrary affiliated libraries. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Foreign relations--Canada.<br/>Canada--Foreign relations--United States.<br/>United States--Boundaries--Canada.<br/>Canada--Boundaries--United States.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic books.
<br/><br/><label>LC Class. No.: </label>E183.8.C2  / P73 1977eb 
<br/><br/><label>Dewey Class. No.: </label>327.71/073