Techniques used in soil investigation: 

 - Welsh soils discussion group  Bangor  1969 
 - 99 p.  Fig., Chart, Table 
 - Report No.  10 .
<br/><br/><label>Nat. Bib. No.: </label>4649 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>624.131  / TEC