Trotter, John E. <br/><br/>
State park system in Illinois / 
John E Trotter 
 - Chicago,  1962. 
 - ix, 152 p. :  ill. ;  23 cm. 
 - University of Chicago. Dept. of Geography. Research paper  no. 74 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Parks--Illinois.
<br/><br/><label>Dewey Class. No.: </label>917.73  / TRS 1962