Hopkins D P <br/><br/>
Chemicals humus adnn the soil 
Hopkins D P 
 - London  Faber and Faber         1949 
 - 278p.  cm. 
<br/><br/><label>Standard No.: </label>52669 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>J:24, H9;1