1. Detection of some polynuclear aromatic hydrocarbons and determination of benzo(a)pyrene in Teheran atmosphere;Abdoh;Atmospheric Environment,1972
2. Ten years of air pollution in Hokkaido. (Text in Japanese);Abe;Taiki Osen Nyusu (Air Pollution News),1971
3. Evaluation of the atmospheric contamination in Madrid in 1969. (Text in Spanish);Anechina;Rev. San. Hig. (Spain),1970
4. Air Quality Data for 1968, APTD-0978, p. 16.
5. Basic industrial sources of the carcinogenic hydrocarbon-Benzo(a)pyrene. (Text in Russian);Bolotova;Med. Z. Uzbekistana,1967