Lighting schoolrooms.
Hamon, Ray L. 1895-
Lighting schoolrooms. - [Washington] Federal Security Agency, U.S. Office of Education [1948] - 17 p. 23 cm. - United States. Office of Education. Pamphlet. no. 104. .
e 48000011
School buildings--Lighting.
L111 / .A75 no. 104
Lighting schoolrooms. - [Washington] Federal Security Agency, U.S. Office of Education [1948] - 17 p. 23 cm. - United States. Office of Education. Pamphlet. no. 104. .
e 48000011
School buildings--Lighting.
L111 / .A75 no. 104