1
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6
by Ennis, J. Harold
Published in Notes and Queries (1927)
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9
by Ganz, L., Ennis, J. E.
Published in BMJ (1951)
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17
by Gray, J A, Young, A, Ennis, J R
Published in BMJ (1983)
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19
by Harrison, R. F, Ennis, J., Brennan, M.
Published in BMJ (1982)
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