Work sampling /
Barnes, Ralph Mosser.
Work sampling / Ralph M. Barnes. - 2nd ed. - New York : Wiley, 1957. - 283 p. : ill.
5710799
Time study.
Sampling (Statistics).
Work sampling / Ralph M. Barnes. - 2nd ed. - New York : Wiley, 1957. - 283 p. : ill.
5710799
Time study.
Sampling (Statistics).