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BTH__Lighting_Bulletin_No_9_CIRCUITS_FOR_DISCHARGE_LAMPS_July_1949.pdf
 BTH Lighting Bulletin No.9 , CIRCUITS FOR DISCHARGE LAMPS , July 1949313 viewsOlav
Philips_Techical_Review_v13nr5_1951_A_new_high-pressure_mercury_lamp_with_fluorescent_bulb.pdf
 Philips_Technical_Review v13nr5_1951 A_new_high-pressure_mercury lamp_with_fluorescent_bulb268 views2 commentsOlav
Philips_Technical_Review_v23nr8_9_1961_1962_recent_improvements_in_sodium_lamps.pdf
 Philips_Technical Review_v23nr8_9 1961_1962_recent_improvements in_sodium_lamps209 viewsOlav
Osram_bulletin_vol_31_April_1954_No_2_extract.pdf
 OSRAM GEC Bulletin, vol.31, April 1954, N°.2 (extract) Lighting for safety in the new towns193 viewsOlav
Philips_Technical_Review_v2nr12_1937_the_sodium_lamp.pdf
 Philips_Technical_Review v2nr12_1937_the_sodium_lamp185 views1 commentsOlav
Philips_Technical_Review_v1nr5_1936_the_mercury_vapour_lamp_HP_300.pdf
 Philips_Technical_Review v1nr5_1936 the_mercury vapour_lamp_HP_300167 viewsOlav
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