1. Department of Consumer and Corporate Affairs and Environment, Manitoba: 1980, Ambient Air Lead ? in Particulate Survey Around Winnipeg's Secondary Lead Smelters, Winnipeg, Manitoba, 70 p.
2. EPS, Environment Canada: 1975, Air Pollution Emissions and Control Technology-Secondary Lead Smelter and Allied Industries, EPS 3-AP-75-3, Ottawa, Ontario, 30 p.
3. Hale, W. E.: 1972, Atmospheric Environment 6, 419.
4. Nicholl, C. S., and Choquette, P. J.: 1977, Ambient Air Quality 1970-74-A Statistical Analysis, Air Pollution Control Directorate, EPS, Environment Canada, EPS 5-AP-76-14, Ottawa, Ontario, pp. 15?19.