PT - JOURNAL ARTICLE AU - Paul V. Harper AU - Katherine A. Lathrop TI - Method to Calculate Activity of a Source from Counting Rates in Single and Coincidence Photopeaks—Reply DP - 1977 Oct 01 TA - Journal of Nuclear Medicine PG - 1044--1044 VI - 18 IP - 10 4099 - http://jnm.snmjournals.org/content/18/10/1044.short 4100 - http://jnm.snmjournals.org/content/18/10/1044.full SO - J Nucl Med1977 Oct 01; 18