Christensen, George C. <br/><br/>
Descriptive accounts of agricultural inventions and of the business cycle, 1940. 

 - 2  items. 
<br/><br/> Open to research. 
<br/><br/><br/>Collection material in English. 
<br/><br/>Forms part of: Miscellaneous Manuscripts collection. 
<br/><br/><label>LCCN: </label>mm 79000495  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural inventions.<br/>Business cycles.