Platt, Robert S.  1891-1964, <br/><br/>
Field study in American geography :  the development of theory and method exemplified by selections / 
Robert S Platt 
 - Chicago,  1959. 
 - 405 p. :  ill. ;  23 cm. 
 - University of Chicago. Dept. of Geography. Research paper  no. 61 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography--Study and teaching--United States.
<br/><br/><label>Dewey Class. No.: </label>910.7  / PLF 1959