Avery, B. W. <br/><br/>
Soil survey laboratory methods 

 - Harpenden:  Lawes Agricultural Trust,  1982 
 - 83p.:  ill.;  21cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil surveys
<br/><br/><label>LC Class. No.: </label>IRA S599.A8