Parker, William N, ed. series True, Alfred Charles <br/><br/>
History of agricultural experimentation and research in the United States 

 - New York  Johnson reprint corporation  1937 
 - vi,321; ill 
 - History of American economy : studies and materials for study .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural experiments<br/>Agricultural research - United States<br/>Agricultural research - United States - history<br/>Experimentation stations