Elements of supervision
Spriegel, W.R.
Elements of supervision by W.R. Spriegel, et. al. - 2nd edn. - New York John Wiley 1957 - 349 p.
Supervision
658 / S 769 E
Elements of supervision by W.R. Spriegel, et. al. - 2nd edn. - New York John Wiley 1957 - 349 p.
Supervision
658 / S 769 E