Air quality :  annual topic update 1998 / 
prepared by Roel M. van Aalst 
 - Luxembourg :  Office for Official Publications of the European Communities,  1999 
 - 29 p. :  maps.;  29 cm. 
 - Topic report ;  7/1999 .
<br/><br/><label>ISBN: </label>9291671398 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air quality--European Union countries
<br/><br/><label>Dewey Class. No.: </label>363.7392