Peet, Michael <br/><br/>
Out of blue?  [videorecording] / 
produced by Michael Peet 
 - Milton Keynes :  Open University Worldwide,  [n.d.] 
 - 1 videocassette (VHS) (25 min.) :  sd., col. ;  1/2 in. 
 - Elements & statistics [videorecording] .
<br/><br/> Copy available in DVD format 
<br/><br/> Described on quality of water and pollution of beach and water 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality biological assessment<br/>Water quality--Measurement