Standard Specification  / 
Dept of sanitary engineer, Govt. of Bihar and Orissa 
 - Patna :  Bihar and Orissa Govt. Press ,  1920 
 - 34 p. ;  33 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air--Pollution--India
<br/><br/><label>Dewey Class. No.: </label>628.5416