Abatement and Control Development Programs & United States Department of Health, Education and Welfare. (1968). A compilation of selected air pollution emission control regulations and ordinances. National Center for Air Pollution Control.
Παραπομπή σε μορφή Chicago (17η εκδ.)Abatement and Control Development Programs και Education and Welfare United States Department of Health. A Compilation of Selected Air Pollution Emission Control Regulations and Ordinances. Washington: National Center for Air Pollution Control, 1968.
Παραπομπή σε μορφή MLA (9th εκδ.)Abatement and Control Development Programs και Education and Welfare United States Department of Health. A Compilation of Selected Air Pollution Emission Control Regulations and Ordinances. National Center for Air Pollution Control, 1968.