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"Annotated Bibliography: Sexual Education Curriculum," http://www.siecus.org/pubs/biblio/bibs0010.html Sexuality Information and Education Council of the United States (SIECUS) Report 26:6, August/September 1998.
National Guidelines Task Force. Guidelines for Comprehensive Sexuality Education, 2nd Edition, Kindergarten-12th Grade. New York: Sexuality Information and Education Council of the United States, 1996.
Cohen, J. and P. Wilson. Taking Sex Seriously : Practical sex education activities for young people. Liverpool: Healthwise Helpline, 1994.
"Teaching Sex Education in the Public Elementary Schools," phone survey, Peter D. Hart Research Associates, Inc., February 20-26, 1999.