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3 Review(s)
](https://rukminim1.flixcart.com/image/400/400/jrtj2q80/book/3/1/7/the-adjustment-testing-of-telescope-objectives-1921-hardcover-original-imafdgxm2rpbgwjf.jpeg?q=90 "The adjustment & testing of telescope objectives 1921 [Hardcover](English, Hardcover, H. Dennis Taylor)")
