@misc{1173086, author = {James Jespersen and Jane Fitz-Randolph}, title = {From sundials to atomic clocks; understanding time and fluency:}, 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.MONO.155}, language = {en}, }