Brush, John E. <br/><br/>
Service centers and consumer trips :  studies on the Philadelphia metropolitan fringe / 
by John E. Brush, Howard L. Gauthier, Jr. 
 - University of Chicago, Chicago :  Dept. of Geography,  1968 
 - x, 182 p. :  ill. ;  23 cm. 
 - Research paper (University of Chicago. Dept. of Geography) ; no.113. .
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Retail trade--Pennsylvania--Philadelphia Metropolitan Area<br/>Origin and destination traffic surveys--Pennsylvania--Philadelphia Metropolitan Area