BEERS, W.F.J.VAN. <br/><br/>
SOME NOMOGRAPHS FOR THE CALCULATION OF DRAIN SPACINGS + 6 GRAPHS 

 - THE NETHERLANDS: ILRI.,  1979 
 - 48P; ILLUST 
<br/><br/><br/>ENG 
<br/><br/><label>ISBN: </label>90-70260-59 
<br/><br/><label>Subjects--Topical Terms: </label><br/>DRAIN.