Media type: E-Article Title: A Procedure for the Differential Correction of Optical Systems Allowing Large Parameter Changes Contributor: Blaschke, W.S.S. imprint: Informa UK Limited, 1956 Published in: Optica Acta: International Journal of Optics Language: English DOI: 10.1080/713823630 ISSN: 0030-3909 Keywords: Electronic, Optical and Magnetic Materials Origination: Footnote: