The Underlying threat [videorecording]
Subtitle: a film about groundwater pollution
By: National Film Board of Canada ; producer, Rex Tasker ; director and writer, Kevin W. Matthews.
Contributors: Matthews, Kevin H.; Tasker, Rex.; National Film Board of Canada.
Published: 1990
Place of publication: Montreal : National Film Board of Canada, c1990
Number of pages: 48
Subjects: Documentary films.; Groundwater -- Pollution -- Canada.
Notes: FOR CLASSROOM USE ONLY.  Closed captioned. Originally released as a motion picture in 1989. Depicts the contamination of the water table in various Canadian communities, water which was often the sole source of drinking water for residents.

VHS.

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