The relationship between sulphur dioxide and sulphate in the Cairo atmosphere / Alia A. Shakour, Ashraf S. Zakey
  Bibliogr.: p. 89-90. - Abstr. eng.
  In: Central European Journal of Occupational and Environmental Medicine. - ISSN 1219-1221. - 1998. 4. évf. 1. sz., p. 82-90.