RESEARCH AND CLINICAL STUDIES IN HEADACHE Vol.6. 532,670 Headache today— An update by 21 experts. Symposium on... of the World Federation of Neurology Committee on Headache and Migraine, Amsterdam,September 13, 1977. Vol. ed-s, A.P. Friedman, Mary E.Granger and M. Critchley. Basel 1978 S.Karger 8 s.VI,nlb. 2,172, il. Research and Clinical Studies in Headache vol. 6