TY  - GEN
AU  - James Jespersen
AU  - Jane Fitz-Randolph
C2  - , National Institute of Standards and Technology, Gaithersburg, MD
DA  - 1977-01-01 05:01:00
DO  - https://doi.org/10.6028/NBS.MONO.155
LA  - en
PB  - , National Institute of Standards and Technology, Gaithersburg, MD
PY  - 1977
TI  - From sundials to atomic clocks; understanding time and fluency:
ER  -