RT Journal Article SR Electronic T1 Determination of Absorption of Vitamin B12 by a Double Isotope Tracer Technique JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 459 OP 464 VO 6 IS 6 A1 Ganatra, R. D. A1 Sundaram, K. A1 Desai, K. B. A1 Gaitonde, B. B. YR 1965 UL http://jnm.snmjournals.org/content/6/6/459.abstract AB