Searching  : IDRC 1988; fresh water, the human imperative 
/ international development research centre 
. - Ottawa  : IDRC, 1989
. - 40 p.  : ill.,couv.ill.en coul  ; 25 cm. 
 -  07147279 .
<br/><br/><label>ISBN: </label>0889365466 
<br/><br/><label>Source: </label> Don 
<br/><br/><label>Universal Decimal Class. No.: </label>551.497.