Bigger, J.H. et al. <br/><br/>
Fighting grasshoppers on Illinois farms 

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 - Illinois-USA    1937 
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 - Circular- Illinois  Est. Exp.   N° 1937 .
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label>--Entomologia--Insecta--Orthoptera--USA--USA<br/>Zoologia