Pfeiffer, Ehrenfried <br/><br/>
Soil fertility, renewal & preservation :  bio-dynamic farming and gardening / 
by Ehrenfried Pfeiffer 
 - London :  Faber and Faber,  1947 
 - 196p. :  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil fertility