International Bureau of Education & International Conference on Public Education. (1967). The shortage of secondary school teachers: Research in comparative education. International Bureau of Education; Unesco.

International Bureau of Education and International Conference on Public Education. The Shortage of Secondary School Teachers: Research in Comparative Education. Geneva, Paris: International Bureau of Education; Unesco, 1967.

International Bureau of Education and International Conference on Public Education. The Shortage of Secondary School Teachers: Research in Comparative Education. International Bureau of Education; Unesco, 1967.