TY - GEN AU - Connolly, V E AU - DeBievre, P AU - Eschbach, H L AU - Gramlich, J W AU - Machlan, L A AU - Meyer, H AU - Trahey, N M AU - Audenhove, J Van AU - Zook, A C AU - Carpenter, B S C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1986-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.260-96 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1986 TI - Standard Reference Materials:Uranium-235 isotope abundance standard reference materials for gamma spectrometry measurements ER -