Motion and time study.
BARNES, Ralph M.
Motion and time study. - 4th. - New York : John Wiley and Sons, 1958. - ix, 665 p. : ill.; 24 cm.
Motion study.
Time study.
Motion and time study. - 4th. - New York : John Wiley and Sons, 1958. - ix, 665 p. : ill.; 24 cm.
Motion study.
Time study.