Koster, J. <br/><br/>
Push tows in canals   
by J. Koster 
 - The Hague  Rijkswaterstaat  1975 
 - 70p. 
 - Rijkswaterstaat Communications  No.21 .
<br/><br/><label>Dewey Class. No.: </label>627.13  / N75