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Langham wants long-term urine samples from one of the plutonium injection subjects, if he can be located. Langham implying that he talked to hasterlik about having jack shubert at argonne conduct plutonium urine analysis obtained in 1950. Additional samples are from hp-12. Langham mentions his success in mathematical analysis of the plutonium human excretion data and again emphasizes the importance of obtaining a long-term urine sample to establish the half-time of excretion of the fourth and slowest exponential component of the excretion curve.
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