Pfeiffer, Dr. Ehrenfried <br/><br/>
Bio-Dynamic Farming and Gardening; soil fertility, renewal and preservation 

 - New York  : Anthroposophic Press/ Rudolf Steiner Publishing  , 1940  , c1938. 
 - 240 p.  : il. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil<br/>Gardening<br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>635 PFE