TY  - BOOK
AU  - Riedel, L and Zschimmer, E
TI  - Dependence of the light transmission of copper ruby glass on the colouring time, colouring temperature and concentration
PY  - 1929///
UR  - http://14.139.222.13:80/cgi-bin/koha/opac-detail.pl?biblionumber=3855
ER  -