Crossland, Frank <br/><br/>
Chemistry of polluted water  [motion picture] / 
Speakers Frank Crossland, Sheila Rawson, Edward Felton 
 - 1 film reel (24 min.) :  sd., col. ;  16 mm +  notes 
<br/><br/> This programme is about the problems District Inspectors and water authority chemists have with accidental, illegal and consented discharges to rivers. Also describes the laboratory techniques water authorities use to measure oil pollution, dissolved oxygen, biochemical oxygen demand, permanganate value and suspended solids  backup in U-matic 3/4 in., and VHS 1/2 in.  Bahan rosak ( Lupus) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Analysis.<br/>Water--Pollution.