TY - JOUR AU - Steven Cundiff AU - Jun Ye AU - John Hall BT - Scientific American DA - 2008-04 N1 - JILA Pub. 7852 PY - 2008 T2 - Scientific American TI - Rulers of Light: Using Lasers to Measure Distance and Time UR - http://www.scientificamerican.com/article.cfm?id=measuring-with-lasers VL - 298 ER -