Orientation in school health

Sonraí bibleagrafaíochta
Príomhchruthaitheoir:	Langton, Clair Van Norman 1895-
Formáid:	LEABHAR
Teanga:	English
Foilsithe / Cruthaithe:	New York, London Harper & brothers [c1941].
Ábhair:	School hygiene. Schools > Sanitary affairs. > U.S. Hygiene > Study and teaching.