Soil fertility research  : a directory of field research conducted by University of California personnel in 1981 and 1982 

 - Berkeley, Ca. :  The University,  1984 
 - 37 p. 
 - Leaflet  ; 21376 .
 - Leaflet  ; 21376 .
<br/><br/><label>LCCN: </label>102 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Fertilidad.<br/>Suelos--Investigación--Directorios.