Statistics of world trade in steel
La ganaderia en America Latina : situation, problemas y perspectivas : I - Colômbia, México, Uruguay y Venezuela : informe preparado con arreglo al programa conjunto
Marital status and fertility : a comparative analysis of world fertility survey data for twenty-one countries
Population and human rights : proceedings of the Symposium on Population and Human Rights : Vienna, 29 June-3 July 1981