WATER QUALITY statistic of India 1990 

 - Delhi  Central Pollution Control Board      1991 
 - 266p  cm. 
 - Monitoring of Indian National Aquatic Resources Series: MINRAS/7/1991-92 .
<br/><br/><label>Standard No.: </label>191861 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>"X9 (D2).2.N92<-N91, GD"