It is becoming perfectly clear that the principles underlying industrial and military efficiency are the same and that a nation, to be efficient in a military sense, must first be efficient industrially

p. 936) cited in: P.B. Petersen (1986) "Correspondence from Henry L. Gantt to an old friend reveals new information about Gantt". In: Journal of Management Fall 1986 vol. 12 no. 3 pp. 339-350. - Industrial leadership, 1916