Champion, C.
, Marinenko, G.
, Sappenfield, K.
, Catanzaro, E.
and Shields, W.
(1970),
Standard Reference Materials:Boric acid; isotopic, and assay standard reference materials, , National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NBS.SP.260-17
(Accessed October 5, 2024)