By Tortora, Gerard J., Funke, Berdell R., Case, Christine L.
By Tortora, Gerard J.
By Tortora, Gerard J., Grabowski, Sandra R.
By Tortora, Gerard J., etc.
By Milburn, Gerard J.
By Hughes, Gerard J.
By Tortora, Gerard J., Grabowski, Sandra Reynolds
By Tortora, Gerard J., Derrickson, Bryan H.
By Kleba, Gerard J.
By Gerard J. Tortora, Nicholas P. Anagnostakos, Tortora, Gerard J., Anagnostakos, Nicholas P.
By Tortora, Gerard J, Anagnostakos, Nicholas P, Gerard J., Nicholas P.
By DeGroot, Gerard J.
By Gerard J. Tortora, Tortora, Gerard J.
By Maisto, Steven a., Galizio, Mark, Connors, Gerard J.
By Tortora, Gerard J., Anagnostakos, Nicholas P.
By Tortora, Gerard J., Anagnostakos, Nicholas P., Grabowski, Sandra Reynolds
By De Groot, Gerard J.