- Online; Still Image
- Black-and-White Photographs
- From excerpt, "The new Grant Stellar Comparator. This machine was installed in April 1971. It measures plates up to 10 x 10 inches to an accuracy of 1/2 micron by advanced electronic techniques."
- University of Virginia Visual History Collection
- Special Collections, University of Virginia Library, Charlottesville, Va.
- Retrieval ID
- Call Number