Symposium on trade wastes 
/ Held at the University of Birmingham Edgbaston on 9th April, 1957 
 - Midland:   The Institute of Sewage Purification,   1957 
 - 112p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Symposium
<br/><br/><label>Universal Decimal Class. No.: </label>628.54.004.5  / J7