1. An experimental application of the Delphi method to the use of experts;Dalkey;Management Sciences,1963
2. Dr O. Helmer has suggested this term
3. Technological projection and advanced product planning;Pardee;RAND Corporation paper, P-3622,1967
4. The Year 2000;Pardee,1967
5. Railroads as an analogy to the space effort: some economic aspects;Fogel,1965