Niebel, Benjamin W.
Motion and time study / Benjamin W. Niebel. - 5th ed. - Homewood, Ill.: R. D. Irwin, 1972. - xii, 709 p. : ill.
Motion study.
Time study.
Motion and time study / Benjamin W. Niebel. - 5th ed. - Homewood, Ill.: R. D. Irwin, 1972. - xii, 709 p. : ill.
Motion study.
Time study.