1960 Keuffel & Esser Zeiss Automatic Level Print Ad
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Catalogue Of Keuffel And Esser 1913 Reprint
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Operator, organizational, direct and general support, and depot maintenance manual : level, surveying, mounted type, dumpy style (Keuffel & Esser ... 6675-937-6863 (SuDoc D 101.11:5-6675-282-15)
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K & E Manual No. 80 0204 Topographic Abney Levels (Uses and Applications with Appropriate Tables)