@misc{1175071, author = {E J Parks and R Faltynek and F E Brinckman}, title = {Environmental factors and mechanisms controlling degradation of Tb(III) chelates: development of effective new Tb phosphors for postage stamp use:}, year = {1987}, month = {1987-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.IR.87-3533}, language = {en}, }