TY  - BOOK
AU  - Koeber,Karl
AU  - Köttelwesch,Helga
AU  - Schneider,Dietrich
TI  - Gmelin handbook of inorganic chemistry: system number 56
SN  - 3540935509
PY  - 1987///
CY  - Berlin, Heidelberg [u.a.]
PB  - Springer
ER  -