TY  - JOUR
T1  - On the Absorption of X-Rays in Copper and Aluminium
JF  - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934)
VL  - 94
IS  - 664
SP  - 567
EP  - 575
PY  - 1918/08/01/
UR  - http://dx.doi.org/10.1098/rspa.1918.0041
M3  - doi:10.1098/rspa.1918.0041
AU  - Williams, C.
ER  -