1 matching record(s)
Pending Spencer, J. L.
"The Refractometer (Total Reflectometer) and the Paths of Light Rays"
offprint from The Gemmologist (London), vol. 6, May 1937, pp. 231-236. (Bound with others of Spencer's works).
[Unknown]
1937
1 matching record(s)
Pending Spencer, J. L.
"The Refractometer (Total Reflectometer) and the Paths of Light Rays"
offprint from The Gemmologist (London), vol. 6, May 1937, pp. 231-236. (Bound with others of Spencer's works).
[Unknown]
1937