Chicken and eggs. 

 - Washington, DC :    U.S Dept. of Agriculture Economic Research Servi ce,    1976- 
 -   ill. ;    26 cm. 
 - Annual 
 - No. 391 (1976)- 
<br/><br/>  Latest issue consulted:  No. 391 (1976). 
<br/><br/><label>Dewey Class. No.: </label>338.105