@article{JRC19208, address = {}, year = {2000}, author = {De Bievre P and Reher DFRG}, abstract = {Abstract not available }, title = {Traceability of Measurements of Radioactivity and of Amount of Substance.}, type = {}, url = {}, volume = {}, number = {}, journal = {Applied Radiation and Isotopes}, pages = {}, issn = {}, publisher = {}, doi = {} }