The **sem** package is available on the Comprehensive R Achive Network (CRAN).

For more information (now quite out of date), see J. Fox (2006), "Structural
Equation Modeling With the sem Package in R."
*Structural Equation Modeling*, 13:465-486, and the package help pages, which include many examples.

The current version of the **sem** package was written by John Fox, Zhenghua Nie, and Jarrett Byrnes.

Please address comments, questions, and suggestions to * jfox
AT mcmaster.ca.*