C. I. Lewis
[ar] كلارنس إرفينغ لويس
[ca] Clarence Irving Lewis
[cs] Clarence Irving Lewis
[de] Clarence Irving Lewis
[es] Clarence Irving Lewis
[fa] کلارنس ایروینگ لوئیس
[fi] Clarence Irving Lewis
[fr] Clarence Irving Lewis
[it] Clarence Irving Lewis
[ja] C・I・ルイス