Temporini, Edméa Rita, et al. “ The Validity of the Visual Acuity Screening in School Children Carried Oat by the Teacher - Comparative Study of the Visual Acuity Measurement by the Teacher and the Ophthalmologist from the City of S. Paulo, Brazil ”. Revista De Saúde Pública, vol. 11, no. 2, June 1977, pp. 229-37, https://doi.org/10.1590/S0034-89101977000200007.