RT Journal Article SR Electronic T1 Assay of Radioactive Materials JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 612 OP 612 VO 10 IS 9 A1 Cliggett, Patricia A. A1 Brown, Joseph M. YR 1969 UL http://jnm.snmjournals.org/content/10/9/612.abstract AB