Robson, T. O. <br/><br/>
Control of aquatic weeds 
T. O. Robson 
 - London  Her Majesty's Stationary Office  1973 
 - vi, 57p.; 23cm. 
<br/><br/> Bulletin no. 194 
<br/><br/><label>Dewey Class. No.: </label>581.5263  / ROB