[10] 1952 年 9 月 22 日 Alfred Teplitz 致 Servomechanisms Laboratory，数值控制项目文件; C. J. Jacoby,“Analysis of Developments in Automation,"Mechanical Engineer-ing (October 1952) (abstracted form D. R. Aufderhride et al. , “Machine Controls ThatRemember,"Harvard Business School Report, 1952); 1952 年 10 月 22日 M. S. Curtis 致William Pease，数值控制项目文件；Andrew Ure，The Philosophy of Manufactures(A. M. KelIey，1967)，p. 369。1952 年 9月18日 Alan A. Smith 致 J. O. McDonough，麻省理工学院档案馆数值控制项目文件。
[11] Nils O. Olesten, “Steppingstones to N/C," Automation (June 1961); Glenn Martin Corporation, "Numerically Controlled Milling," 1957; Convair Corp. , “N/C Manual," Convair Tooling Department, November 1957; Boeing Corp. , “Numerical Control of Manufacturing Equipment,"June 1956; Norden Division, United Technologies, “Power in Numbers: The How and Why of N/C," n. d..
[12] Murray Kanes, “Bendix Tape Control System," Proceedings of the EIA Symposium; Joseph J. Columbro, “Numerical Control: Automation for the Job Shop," M. S. Thesis, Department of Business Organization, Ohio State University, 1958 (courtesy Joseph J. Columbro) ; Ralph Cross, “A Machine-Tool Builder Looks at N/C. "
[13] Herbert L. Wright, Beginner's Course in N/C; Leifer, “Automatic Control of Turret Lathes"; Grayson Stickell, “How Can New Machines Cut Costs?" Tooling and Production (August 1960); MOOG, Hydrapoint News, 1975.
[14] “On the Job, Automatic Tools Prove Virtuosos," Business Week March 14, 1959; "Machine Tool Control for Tomorrow," American Machinist (October 25, 1954), p. 134; "What Is Numerical Control?" American Machinist (October 25, 1954) , p. 142.
[15] Cox and Cox, “Management Report: N/C Machine Tools," July 1958, N/CProject Files；还可参见 1958 年 7 月 16 日 David M. Cox 致 Frank Reintjes； 1958 年 7 月14 日 Reintjes 致 Cox，麻省理工学院档案馆数值控制项目文件；“The Machine ToolsThat Are Building America," Iron Age (August 30, 1976). p. 158.
[16] Crossman et al. , “The Impact of N/C on Industrial Relations", Earl Lundgren, “Effects of N/C on Organizational Structure,” Automation (January 1969), p. 44.
[17] Small Business Administration, “The Impact of N/C on Small Business. "
[18] Robert T. Lund et al. , “Preliminary Findings of Study of N/C Machine Tools and Group Technology," Center for Policy Alternatives, MIT, December 21, 1977; Lund et al. , “Final Report: N/C Machine Tools and Group Technology," Center for Policy Alternatives, MIT, January 13, 1978.
[19] Ervin M. Birt, "Organizational and Behavioral Aspects of N/C Machille Tool Innovation," M. S. Thesis, School of Management, MIT, 1959.
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