"lehrer, robert n. "
work simplification:creative thinking about work problems: / robert.n. lehrer - 1 ed. - usa : prentice-hall 1957. - "xiv, 394p.; 23 cm."
hard cover
658. 542 leh
work simplification:creative thinking about work problems: / robert.n. lehrer - 1 ed. - usa : prentice-hall 1957. - "xiv, 394p.; 23 cm."
hard cover
658. 542 leh