Liberman,  I.Y., Shankweiler, D., Camp, L., Blachman, B., & Werfelman, M. (1979). Steps toward literacy:  A linguistic approach. In Resnick  L., Weaver, P.(eds.
Liberman, I.Y., Shankweiler, D., Camp, L., Blachman, B., & Werfelman, M. (1979). Steps toward literacy: A language-based approach to reading development.