Ruffin, Edmund,   1794-1865. <br/><br/>
An essay on calcareous manures   [electronic resource] / 
by Edmu nd Ruffin ; edited by J. Carlyle Sitterson. 
 - Cambridge, Mass. :   Belknap Press of Harvard University Press,   c1961. 
 - xxxv, 199 p. ;   22 cm. 
 - John Harvard library .
 - John Harvard library. ACLS Humanities E-Book. .
<br/><br/>Includes bibliographical references. 
<br/><br/><br/> Electronic text and image data. <br/> Ann Arbor, Mich. : <br/> University of Michigan, Michigan Publishing, <br/> 2009. <br/> Includes both TIFF files and keyword searchable text. <br/> ([ACLS Humanities E-Book]) <br/> Mode of a ccess: Intranet. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Marl.<br/> Fertilizers.