295,685 BIOLOGICAL Biological rhythms, sleep and shift work. Proceedings of a conference on Variations in Work-Sleep Schedules: effects on Health and Performance... held in San Diego, California, September 19-23, 1979. Ed. by Laverne C. Johnson /et al./ Lancaster 1981 MTP Press Ltd 4° s. nlb. 12, 618, il. Advances in Sleep Research vol. 7