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Number:
6318
Author:
J. Venn
Issue:
ET Vol 33, May 1880
Tags:
Combinatorics
Solved by:
R.R. Grey, MQ Vol 33
Solved by:
H. MacColl, MQ Vol 33
Solved by:
C.J. Monro, MQ Vol 33
Solved by:
J. Venn, MQ Vol 33