1. WHO Pub Health Paper;Lawther P.J.,1962
2. Goldberg, N.S. 1963. The Effect on the Respiratory Organs of Quartz-Containing Dust in the Atmosphere. World Health Organization inter-regional symposium on the Criteria for Air Quality and Methods of Measurement. Aug61963, Geneva. read before
3. STREET RISK OF CARBON MONOXIDE POISONING