TY  - BOOK
AU  - Birnbaum,Edward R.
AU  - Forsberg,John H.
TI  - Gmelin handbook of inorganic chemistry: rare earth elements; system number 39
SN  - 3540935290
PY  - 1986///
CY  - Berlin, Heidelberg [u.a.]
PB  - Springer
ER  -