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In W. Va., Me., La., Ga., Ark., and N. Mex. A separate bulletin for each state.
In W. Va., Me., La., Ga., Ark., and N. Mex. A separate bulletin for each state.
Spirit leveling
Dept. Interior, U. S. Geol. Survey bul
Marshall, R.B. (author)
1916
Article (Journal)
English
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Engineering Index Backfile | 1916
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|Discussion on Precise Spirit Leveling
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|Closure on Precise Spirit Leveling
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|Leveling instruments with spirit levels
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