Fensterstock, J. C.; Kurtzweg, J. A.; Ozolins, G. (1971). „Reduction of Air Pollution Potential through Environmental Planning“. Journal of the Air Pollution Control Association. 21 (7): 395–399. doi:10.1080/00022470.1971.10469547. PMID5148260.
Fensterstock, J. C.; Kurtzweg, J. A.; Ozolins, G. (1971). „Reduction of Air Pollution Potential through Environmental Planning“. Journal of the Air Pollution Control Association. 21 (7): 395–399. doi:10.1080/00022470.1971.10469547. PMID5148260.