539,581 DRUG Drug receptors and their effectors. Report of a symposium held on 31 March and 1 April 1980 in London at the Middlesex Hospital Medical School. Ed. by Nigel J. M. Birdsall. London 1981 The Scientific and Medical Division Macmillan Publ. Ltd 8 s. nib. VIII, nib. 2, 182, il. Biological Council the coordinating Committee for Symposia Apn Drug Action