| Literature DB >> 5278156 |
A S Beare, D A Tyrrell, D Hobson, C H Howells, M S Pereira, T M Pollock, L E Tyler.
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Year: 1969 PMID: 5278156 PMCID: PMC2130700 DOI: 10.1017/s002217240004136x
Source DB: PubMed Journal: J Hyg (Lond) ISSN: 0022-1724