Schmandt-Besserat, D., & Hallo, W. W. (1992). Before writing: From counting to cuneiform (First edition.). University of Texas Press.

Schmandt-Besserat, Denise, and William W. Hallo. Before Writing: From Counting to Cuneiform. First edition. Austin: University of Texas Press, 1992.

Schmandt-Besserat, Denise, and William W. Hallo. Before Writing: From Counting to Cuneiform. First edition. University of Texas Press, 1992.