Lloyd David, Rossi Ernest L. Ultradian rhythms in life processes an inquiry into fundamental principles of chronobiology and psychobiology - - London Springer-Verlag 1992 - 419 p. 25 cm. - . Activity Cycles, Chronobiology, Circadian Rhythm, Sleep, Wakefulness ISBN: 354019746X Subjects--Topical Terms: ChronobiologyActivity CyclesWakefulnessSleepCircadian Rhythm Dewey Class. No.: QT167 / LLO