@article{JRC18375, address = {}, year = {1999}, author = {Rossbach M and Grobecker K}, abstract = {Abstract not available }, title = {Homogeneity Studies of Reference Materials by Solid Sampling - AAS and INAA.}, type = {}, url = {}, volume = {4}, number = {}, journal = {Accreditation and Quality Assurance}, pages = {498-503}, issn = {}, publisher = {}, doi = {} }