LOCKHART, Barbara. A Comparative Study of College Achievement of DeLand High School Graduates Under the Semester and the Trimester Plans. Florida Journal of Educational Research, [S. l.], v. 7, n. 1, p. 35–39, 1965. Disponível em: https://journals.flvc.org/fjer/article/view/134002. Acesso em: 24 nov. 2024.