National urban air quality trends 1981-1990
By: by Tom Furmanczyk.
Contributors: Canada. Environment Canada.
Publisher: Environment Canada
Published: 1994
Place of publication: [Ottawa]
Language: eng
Number of pages: 57
Subjects: Air quality -- Canada; Air -- Pollution -- Canada -- Measurement; Urban ecology -- Canada; Environmental monitoring -- Canada
Notes: "report PS 7/UP/4."

"October 1994."

Issued also in French under title: Évolution de la qualité de l'air des villes au Canada (1981-1990).

Includes bibliographical references (p. 47-48).

Includes abstract in French.