Icon, Index, and Symbol. Burks, A. W. 9(4):673–689.
Paper bibtex @article{burks1949,
author = {Arthur W. Burks},
date = {1949},
journaltitle = {Philosophy and Phenomenological Research},
number = {4},
pages = {673--689},
title = {Icon, Index, and Symbol},
url = {http://www.jstor.org/stable/2103298},
volume = {9},
}