1. Traces—Technology in Retrospect and Critical Events in Science;Bartocha,1970
2. Reference Source on Soviet R and D Statistics;Campbell;Report to the National Science Foundation,1978
3. Soviet R and D Statistics, 1970–1983;Campbell;Report to the National Science Foundation,1983
4. Sampling Techniques;Cochran,1953
5. Trends in American Economic Growth, 1929–1982;Denison,1985