books, catalogs and documents
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![Filename=Osram_bulletin_vol_31_April_1954_No_2_extract.pdf
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OSRAM GEC Bulletin, vol.31, April 1954, N°.2 (extract) Lighting for safety in the new towns8 viewsOlav
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![Filename=Philips_Techical_Review_v13nr5_1951_A_new_high-pressure_mercury_lamp_with_fluorescent_bulb.pdf
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Philips_Technical_Review v13nr5_1951 A_new_high-pressure_mercury lamp_with_fluorescent_bulb11 viewsOlav
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![Filename=Philips_Technical_Review_v1nr5_1936_the_mercury_vapour_lamp_HP_300.pdf
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Philips_Technical_Review v1nr5_1936 the_mercury vapour_lamp_HP_3008 viewsOlav
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![Filename=Philips_Technical_Review_v23nr8_9_1961_1962_recent_improvements_in_sodium_lamps.pdf
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Date added=07 Jun, 2024 Philips_Technical_Review_v23nr8_9_1961_1962_recent_improvements_in_sodium_lamps.pdf](albums/userpics/10174/thumb_Philips_Technical_Review_v23nr8_9_1961_1962_recent_improvements_in_sodium_lamps.png)
Philips_Technical Review_v23nr8_9 1961_1962_recent_improvements in_sodium_lamps4 viewsOlav
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![Filename=Philips_Technical_Review_v2nr12_1937_the_sodium_lamp.pdf
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Philips_Technical_Review v2nr12_1937_the_sodium_lamp6 viewsOlav
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