TY  - RPRT
TI  - Surveying.
AU  - J G Hanson
AU  - S Axinn
AU  - E N Kopp
PY  - 1975
DO  - 10.14219/jada.archive.1975.0463
UR  - https://pubmed.ncbi.nlm.nih.gov/1099142/
ID  - 1099142
ER  -