Marx, Robert E. <br/><br/>
Hay harvesting methods and costs, 
by Robert E. Marx and James W. Birkhead. 
 - Washington,  [U. S. Govt. Print. Off.]  1951. 
 - 122 p. :  illus., map ;  24 cm. 
 - U. S. Dept. of Agriculture. Circular  no. 868 .
 - Circular (United States. Department of Agriculture) ;  no. 868. .
<br/><br/> Cover title. 
<br/><br/><label>LCCN: </label>agr51000327  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hay--Harvesting.<br/>Hay--Harvesting--Cost.<br/>Harvesting.
<br/><br/><label>LC Class. No.: </label>SB198  / .M45 
<br/><br/><label>National Agricultural Library Call No.: </label>1  / Ag84C no.868