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. 1986 Apr;30(2):212–215. doi: 10.1017/s0025727300045403

Illustrations from the Wellcome Institute Library. The archive of the Lister Institute of Preventive Medicine.

L Hall, N Morgan

PMCID: PMC1139619 PMID: 3517527

212

Images in this article

Figure 3
on p.212-3

Figure 4
on p.212-4

Figure 2
on p.212-2

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