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Remarks on engineers' surveying instruments
math Heller & Brightly · Heller & Brightly
48 sayfa · 1874
Catalogs. [from old catalog] / Instruments / Surveying
Defects and disadvantages of the present form of tripods for field-instruments
Heller & Brightly, math. inst. makers, Philadelphia · Heller & Brightley
910 sayfa · 1878
Surveying / Instruments