The following information obtained from UNAVCO's online DOI system:
(https://www.unavco.org/data/doi/search/search.html)

Southwest Montana GPS Network - LRID-Lost River P.S.
Start: 08-Oct-2011
End: 21-Jul-2019
Bendick, Rebecca, 2012, Southwest Montana GPS Network - LRID-Lost River P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5NK3BZD