TY - JOUR AU - Kevin Coakley AU - A Leifer AU - David Simons C2 - The International Journal of Mass Spectrometry DA - 2005-01-01 00:01:00 LA - en M1 - 240 PB - The International Journal of Mass Spectrometry PY - 2005 TI - Secondary Ion Mass Spectrometry Measurements of Isotopic Ratios: Correction for Time Varying Count Rate ER -