TY  - RPRT
TI  - Environmental factors and mechanisms controlling degradation of Tb(III) chelates: development of effective new Tb phosphors for postage stamp use 
AU  - Parks, E J
AU  - Faltynek, R, A
AU  - Brinckman, F E
PY  - 1987
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 87-3533
DO  - 10.6028/NBS.IR.87-3533
ER  -