1. Power, T. G.P. Sept. 10, 1971.
2. Paper read at the 78th Health Congress of the Royal Society for the Promotion of Health;Baines,1971
3. Paper read at the 78th Health Congress of the Royal Society for the Promotion of Health;Quantrill,1971
4. Paper read at the 78th Health Congress of the Royal Society for the Promotion of Health;Nichols,1971
5. Observations in the Haight-Ashbury Medical Clinic of San Francisco