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Mathur A, Merrell JC, Russell RC, Zook EG.Mathur A, et al. Among authors: merrell jc.Scan Electron Microsc. 1983;(Pt 2):975-81.Scan Electron Microsc. 1983.PMID: 6635582
Luce TS, Merrell JC.Luce TS, et al. Among authors: merrell jc.J Drug Educ. 1995;25(4):297-306. doi: 10.2190/K52X-4Q8M-H7UT-84AA.J Drug Educ. 1995.PMID: 8907401