Traction of boats on canals canalised rivers and free rivers of the rhine Basin :  report / 
edited by M. Mutze 
 - Paris :  Imprimeric Generale Lahure,  1892 
 - 34 p. ;  26 cm. 
<br/><br/> 6th question 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Roads--Design and construction