Purdom, P. W., Chambers, L. A., Nicholson, L. A., Pickard, R. C., Rihm, A., Stead, F. M., . . . Wheeler, E. P. (1960). Role of Public Health Agencies in Air Pollution Control. Report of Air Hygiene Committee, Engineering and Sanitation Section, APHA.

Purdom, P. W., Leslie A. Chambers, L. Arnold Nicholson, Ralph C. Pickard, Alexander Rihm, Frank M. Stead, Arthur C. Stern, Raymond Smith, και Elmer P. Wheeler. Role of Public Health Agencies in Air Pollution Control. Report of Air Hygiene Committee, Engineering and Sanitation Section, APHA. 1960.

Purdom, P. W., et al. Role of Public Health Agencies in Air Pollution Control. Report of Air Hygiene Committee, Engineering and Sanitation Section, APHA. 1960.