Theobald, G. H. <br/><br/>
Methods and machines for tile and other tube drainage / 
prepared by G.H. Theobald. 
 - Rome :  FAO of the United Nations,  1963. 
 - xiii, 104 p. :  ill. 
 - FAO agricultural development paper ; no. 78 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drainage.