$a Sleep research : proceedings of the Northern European Symposium on Sleep Research, Basle, September 26 and 27, 1978 / ed. by R. G. Priest, A. Pletscher and J. Ward. - Lancaster, cop. 1979. $b CIP BL (Ward, John) ; (Department of Medical Information, International Pharma Division, F. Hoffmann-La Roche & Co. Ltd., Basle, Switzerland)