Credo Reference - use this resource to find articles in a large collection of e-reference works.
Eisenman, Russell. "Birth order and personality." in Psychology and Mental Health. Ed. Nancy A. Piotrowski, 3d ed. 5 vols. Pasadena, Calif.: Salem Press, 2009. Salem Health Web. - (This e-reference article is located in Salem Health. Library also has print version. in reference)
Gale Virtual Reference Library (also called GVRL). Use this resource to find articles in a collection of e-reference works. (Library also has print versions of some of the titles.)