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SAND PRAIRIE SECTION..........4A NON-AGRICULTURAL AREAS 
GRAIN- HORSERADISH ECONOMY ‘ 
— MOUNDS SECTION 5A nn SUS ea AREAS 
f Re euaar ect SECA 6A ==] Lakes & SWAMPS NOT 
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CENTRAL BLUFFS SECTION.....9A 
a a 2 3 
FIELD WORK 
MADISON €0.1933 
ST. CLAIR CO,, 1934 FIGURE 17 
