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1.
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Errors in levelling due to obliquity of staves, "personal paper" for the Twelfth Congress of FIG (Commission 6) in London 1968 by Language: English
Publication details: RICS 1968
Availability: Items available for loan: London (1)Collection, call number: RICS 1968/56.
2.
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Refraction near the ground and its influence on precise levelling; "personal paper" for the Twelfth Congress of FIG, London, 1968 by Language: English
Publication details: RICS 1968
Availability: Items available for loan: London (1)Collection, call number: RICS 1968/55.