The harmonious pulse.
Holford-Strevens
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D001683:Biological Clocks; D018645:Greek World / Q000266:history; D049690:History, Ancient; D049691:History, Medieval; D009146:Music / Q000266:history; D010507:Periodicity; D011674:Pulse / Q000266:history / Q000523:psychology; D018644:Roman World / Q000266:history