Source Department of Commerce. Bureau of the Census, decennial census reports and National Research 

 Council. Doclorafe Recipients from U.S. Universities, annual series 



Table 48. Unemployment rates, 1963-72 



Sources Department of Labor. Bureau of Labor Statistics, periodic reports on labor force and National 

 Science Foundation. Unemployment Rates and Employment Characteristics lor Scientists and 

 Engineers. 1971 (NSF 72-307) 



130 



