Gondhowiardjo, Tjahjono, Irma Andriyani, S. Gumay, Widya Artini, and R.A. Werdhana. 1. “Diagnostic Value of Contrast Sensitivity Test and Conjunctival Impression Cytology for the Detection of Sub-Clinical Vitamin-a Deficiency”. Asian Journal of Ophthalmology 13 (4), 131-40. https://doi.org/10.35119/asjoo.v13i4.168.