Supervising instruction in secondary schools

Bibliografiske detaljer
Hovedforfatter:	Hammock, Robert C. 1908-
Andre forfattere:	Owings, Ralph S. 1903-
Format:	Bog
Sprog:	English
Udgivet:	New York McGraw-Hill 1955.
Serier:	McGraw-Hill series in education
Fag:	School supervision, Secondary.