United States--Canada air quality agreement :
The Air Quality Committee.
United States--Canada air quality agreement : 1994 progress report / by the Air Quality Committee. - Washington, D.C. : Environmental Protection Agency, 1994. - ii, 64 p. : ill.
Air quality management--Government policy--United States--Cost effectiveness.
Air--Pollution--Government policy--United States--Cost effectiveness.
United States--Canada air quality agreement : 1994 progress report / by the Air Quality Committee. - Washington, D.C. : Environmental Protection Agency, 1994. - ii, 64 p. : ill.
Air quality management--Government policy--United States--Cost effectiveness.
Air--Pollution--Government policy--United States--Cost effectiveness.