W M Ludlam

Photographic analysis of the ocular dioptric components. 3. The acquisition, storage, retrieval and utilization of primary data in photokeratoscopy.

W M Ludlam, S Wittenberg, J Rosenthal, 1967, American journal of optometry and archives of American Academy of Optometry.

The effect of measuring corneal toroidicity with reference to the line of sight.

W M Ludlam, S Wittenberg, 1966, The British journal of physiological optics.