https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!228030~!0#focus ...
Ernst Leitz Optical Works ; E. Leitz, Inc. (New York, NY) ; E. Leitz, Inc. (NJ) ; Leica Geosystems ; Leica, Inc. (NY) ; Leica, Inc. (IL) ; Leica Instruments GmbH ...
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