TY - JOUR AU - Alan Migdall C2 - Physics Today DA - 1999-11-01 LA - en M1 - 52 PB - Physics Today PY - 1999 TI - Differences Explained in Correlated-Photon Metrology Techniques UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=104037 ER -