Out of blue?
Peet, Michael
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] .
Copy available in DVD format
Described on quality of water and pollution of beach and water
Water quality biological assessment
Water quality--Measurement
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] .
Copy available in DVD format
Described on quality of water and pollution of beach and water
Water quality biological assessment
Water quality--Measurement