“Superconductors and Gravitational Drag” by American theoretical physicist Bryce S. DeWitt

Bryce DeWitt (or here) was an American theoretical physicist noted for his work in gravitation and quantum field theory.

The PDF is online here:

https://github.com/richgel999/uap_resources/blob/main/Superconductors_and_Gravitational_Drag_PhysRevLett.16.1092.pdf

This was published in “Physical Review Letters”, Volume 16, Number 24, 13 June 1966, received 6 May 1966. This research was supported in part by the U. S. Air Force Office of Scientific Research under Grant No. AFOSR-153–64.