Water quality control network  proceedings of the meeting held in Ottawa, Canada, 20-24 Feb.,1989 
compiled and edited by P. Payment and W.A. Sanchez 
 - Ottawa  International Development Research Centre  1990 
 - 25 p. ; 28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality--Congresses