Ruff, C. F., Ayers, J. L., Simon, S. E., & Templer, D. I. (1976). The fear of heights among alcoholics: additional data relevant to the Curlee and Stern study. Bulletin of the Menninger Clinic, 40(2), 162–163. http://www.guilford.com/cartscript.cgi?page=periodicals/jnme.htm\&cart\_id=547216.21319