Grass :  the yearbook of agriculture 1948. 

 - Washington :  Department of Agriculture,  1948. 
<br/><br/>Bibliografía: p. 855-878. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pastizales<br/>Pastoreo
<br/><br/><label>Index Terms--Genre/Form: </label><br/>anuario