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Astragal Press
> L. E. Gurley
L. E. Gurley
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(ISBN-10)
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tion
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A Manual of American Engineer's and Surveyor's Instruments
978-1-879335-34-9
(1-879335-34-4)
1993
W. Gurley
E. G. ??
·
L. E.
·
L.G.
L.E. Gusel'nikov