TY  - RPRT
TI  - An evaluation of dependencies of critical infrastructure timing systems on the global positioning system (GPS) 
AU  - Lombardi, Michael A
PY  - 2021
PB  - National Institute of Standards and Technology (U.S.)
CY  - Gaithersburg, MD
SN  - NIST TN 2189
DO  - 10.6028/NIST.TN.2189
ER  -