Haystead, Ladd,  1903- <br/><br/>
The agricultural regions of the United States / 
Ladd Haystead & Gilbert C. Fite. 
 - Norman :  University of Oklahoma Press,  c1955 
 - xx, 288 p. :  illus., maps (part fold.) ;  23 cm. 
<br/><br/>"Notes on sources and additional reading": p. 276-280. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--United States.
<br/><br/><label>Dewey Class. No.: </label>333.76  / HAA 1955