Harris, Franklin Stewart,  1884-1960. <br/><br/>
The principles of agronomy / 
by Franklin S. Harris and George Stewart. 
 - Revised edition. 
 - xvi páginas, 1 l., 581 p. :  front., illus., diagrs. ;  21 cm. 
 - Rural text-book series. .
<br/><br/>Contains bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura.
<br/><br/><label>LC Class. No.: </label>S495  / .H3 1930