Thorington, J. (1900). Refraction and how to refract: Including sections on optics, retinoscopy, the fitting of spectacles and eye-glasses, etc (2d ed.). P. Blakiston's son & co..

Thorington, James. Refraction and How to Refract: Including Sections on Optics, Retinoscopy, the Fitting of Spectacles and Eye-glasses, Etc. 2d ed. Philadelphia: P. Blakiston's son & co., 1900.

Thorington, James. Refraction and How to Refract: Including Sections on Optics, Retinoscopy, the Fitting of Spectacles and Eye-glasses, Etc. 2d ed. P. Blakiston's son & co., 1900.