TY - JOUR AU - Judah Levine BT - The European Physical Journal H DA - 2016-03 DO - 10.1140/epjh/e2016-70004-3 PY - 2016 T2 - The European Physical Journal H TI - The history of time and frequency from antiquity to the present day UR - http://link.springer.com/10.1140/epjh/e2016-70004-3 SN - 2102-6459 ER -