Wilford W. Spradlin

Digital Coding and the Acquisition of Language

Wilford W. Spradlin, Patricia B. Porterfield, 1979 .

Roles and Counterroles within the Family

Wilford W. Spradlin, Patricia B. Porterfield, W. Spradlin, 1979 .

Knowledge in Numbers

Wilford W. Spradlin, Patricia B. Porterfield, W. Spradlin, 1984 .

The Emergence of I

Wilford W. Spradlin, Patricia B. Porterfield, W. Spradlin, 1984 .

The Search for Certainty

Wilford W. Spradlin, Patricia B. Porterfield, W. Spradlin, 1984, Springer New York.