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. 1941 Mar;31(3):257–263. doi: 10.2105/ajph.31.3.257

Exhibits ^*

Mayhew Derryberry

PMCID: PMC1531207 PMID: 18015402

260

Images in this article

Figure 1
on p.258

Figure 2
on p.260

Figure 3
on p.261

Figure 4
on p.262

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