Subject(s): Biological rhythms | Circadian rhythms | Photoperiodism
Contents:Biological clocks at the end of the 20th century / M. Menaker -- Clocks, genes and evolution: the evolution of circadian organization / V.K. Sharma and A. Joshi -- Circadian frequency and its variability / S. Daan and D.G.M. Beersma -- Period doubling of rhythmic