International guide to educational documentation, 1960-1965 : Guide international de la documentation pédagogique, 1960-1965. Guía internacional de la documentación pedagógica, 1960-1965
International directory of music education institutions = Répertoire international des institutions d’éducation musicale = Repertorio internacional de instituciones de educación musical
International directory of agricultural engineering institutions / [prepared by H. J. Hopfen, Technical Officer, F.A.O.].