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Considerations of acidifying water samples for 99Tc analysis.
Blanchard RL, Lieberman R, Richardson WS 3rd, Wakamo CL. Blanchard RL, et al. Among authors: richardson ws 3rd. Health Phys. 1993 Aug;65(2):214-5. doi: 10.1097/00004032-199308000-00014. Health Phys. 1993. PMID: 8392504
Dentin proteins: chemistry, structure and biosynthesis.
Butler WT, Munksgaard EC, Richardson WS 3rd. Butler WT, et al. Among authors: richardson ws 3rd. J Dent Res. 1979 Mar;58(Spec Issue B):817-24. doi: 10.1177/00220345790580023301. J Dent Res. 1979. PMID: 283122