Number:
13616
Author:
Issue:
ET Vol 50, Oct 1897
Tags:
Non-Conic Curves & Locus/Envelopes
Solved by:
H.W. Curjel, MQ Vol 68
Solved by:
W.E. Jeffares, MQ Vol 68
Solved by:
Lionel E. Reay, MQ Vol 68