Number:
16509
Author:
Issue:
ET Vol 61, Sep 1908
Tags:
3-Dimensional Geometry / Surfaces / Tetrahedra / Spheres
Solved by:
W.H. Blythe, MQ Vol 91
Solved by:
L. Isserlis, MQ Vol 91
Solved by:
A.M. Nesbitt, MQ Vol 91