@misc{1158576, author = {J D Siegwarth}, title = {A portable calibration densimeter for use in cryogenic liquids:}, year = {1981}, month = {1981-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.TN.1035}, language = {en}, }