@misc{1184946, author = {B A Younglove and J D Siegwarth}, title = {Cryogenic fluids density reference system ::provisional accuracy statement}, year = {1977}, month = {1977-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.IR.77-852}, language = {en}, }