Acker, W.L. III <br/><br/>
Basic Procedures for Soil Sampling and Core Drilling 
By W.L. Acker III 
 - U.S.A  Acker Drill Co., Inc.  1974 
 - xvii, 246 pages, 23 cm. 
<br/><br/><label>Dewey Class. No.: </label>551.305 Ac5 1974