Christensen, Jolene, Brian K. Warnick, Debra Spielmaker, Rudy S. Tarpley, and Gary S. Straquadine. 2009. “Agricultural In-Service Needs of Introductory Level Career and Technical Education Teachers”. Journal of Agricultural Education 50 (4):1-13. https://doi.org/10.5032/jae.2009.04001.