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

UNAVCO GPS Network - PLMM-Platteville P.S.
Start: 03-Jun-1995
End: 06-Mar-1997
UNAVCO Community, 1995, UNAVCO GPS Network - PLMM-Platteville P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T52B8W7T