Bob G. Mahrenholz wrote:
Hi'
I'm needing a copy of articles on bandpass filtering using negative
mutual coupling
(a la J.W. Miller) in the February 18, 1931 issue of Wireless World and
in the December, 1936 issue of Radio Engineering magazine. Will pay a
reward.

A good library should have them. The British Library has held a copy of
everything published in the UK for a long time.

Leon