1. Epidemiology of strabismus;Graham, P.A.;British Journal of Ophthalmology,1974
2. Early case finding and the hereditary factor in strabismus;Pratt-Johnson, J.A.; Lunn, C.T.;Canadian Journal of Ophthalmology,1967
3. Squint: the binocular reflexes and the treatment of strabismus;Worth, C.; Chavasse, B.,1959