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| THE ELECTRONIC JOURNAL OF COMBINATORICS 4 (1997), DS #5. |
A painting of John Venn by Charles E. Brock. Photograph by Christopher Hurst, Hamilton-Kerr Institute, University of Cambridge. Reproduced by kind permission of the Master and Fellows of Gonville and Caius College.
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| THE ELECTRONIC JOURNAL OF COMBINATORICS 4 (1997), DS #5. |