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

Peatland Minnesota GPS Network - LIA1-Bog-Lawn Intensive Array 1 P.S.
Start: 31-Jul-2009
End: 03-Feb-2013
Glaser, Paul, 2009, Peatland Minnesota GPS Network - LIA1-Bog-Lawn Intensive Array 1 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5T151ZG