I. Ishak

Subjective estimates of colour attributes for surface colours.

H. Bouma, I. Ishak, H. van Bussel, 1970, Vision research.

The Photopic Luminosity Curve for a Group of Fifteen Egyptian Trichromats

I. Ishak, 1952 .

The Spectral Chromaticity Coordinates for One British and Eight Egyptian Trichromats

I. Ishak, 1952 .

The chromaticity co‐ordinates for the standard illuminants SA, SB and SC of one British and fifteen Egyptian observers

I. Ishak, 1951, The Journal of physiology.

Determination of the Tristimulus Values of the Spectrum for Eight Egyptian Observers and One British Observer

I. Ishak, 1952 .