1. The coming era of shortages;Benoit E.;The Bulletin of the Atomic Scientists,1976
2. Reviewing the international order;Tinbergen J.,1976
3. Numerical taxonomy in marketing analysis;Frank R. E.;Journal of Marketing Research,1969
4. Forecasting international relations;Rummel R. J.;Technological forecasting and social change,1969
5. Quantitative analysis of modernization and development;Harbison F. H.,1970