TY  - RPRT
TI  - Methods of practice and guidelines for using survey-grade global navigation satellite systems (GNSS) to establish vertical datum in the United States Geological Survey
AU  - Paul H. Rydlund
AU  - Brenda K. Densmore
PY  - 2012
DO  - 10.3133/tm11d1
UR  - https://pubs.usgs.gov/publication/tm11D1
ID  - tm11D1
ER  -