LEADER 00000nam 2200193 a 4500 001 0637023 003 UkHlHU 007 t 008 001105 2 1952 000 eng 040 UkHlHU 050 4 JMGP L7 110 2 Lighting Service Bureau. 245 00 Light in Schools. 260 The Burgan,|c1952. 300 0000p. 650 0 Education.
