Motorized leveling at the National Geodetic Survey / [mikrofis]
PSZJBL
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| Format: | |
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Rockville, Md : U S National Geodetic Survey,
1980
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PSZJBL
| Main Author: | |
|---|---|
| Format: | |
| Published: |
Rockville, Md : U S National Geodetic Survey,
1980
|
| Subjects: |