Proceedings of the World Population Conference : Belgrade, 30 August-10 September 1965. (United Nations, 1966)
Τ.1. - vi, 349 σ. - 1966 – τ. 2. - xiii, 510 σ. - 1967 – τ. 3. - xi, 435 σ. – 1967 – τ.4. - xiii, 557 σ. – 1967.