Ruffin, Edmund,  1794-1865. <br/><br/>
An essay on calcareous manures. 
By Edmund Ruffin. 
 - Petersburg, Va.,  J. W. Campbell,  1832. 
 - xii, [13]-242 p.  19 cm. 
<br/><br/>
<br/><br/><label>LCCN: </label>agr17000544  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marl.<br/>Fertilizers.
<br/><br/><label>LC Class. No.: </label>S643  / .R92 1832