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| [Vol_III] Directives Concerning the Protection of Telecommunication Lines against Harmful Effects from Electric Power and Electrified Railway Lines: Volume III Geneva, 1990 | 56 CHF |
| [Vol_IV] Directives Concerning the Protection of Telecommunication Lines against Harmful Effects from Electric Power and Electrified Railway Lines: Volume IV Geneva, 1990 | 62 CHF |
| [Vol_VI] DIRECTRICES sobre la protección de las líneas de telecommunicación contra los efectos perjudiciales de las líneas de energía eléctrica y de las líneas ferroviarias electrificadas: Volumen VI Peligro y perturbaciones - Ginebra 1990 | 21 CHF |
| [Vol_VIII] Directives Concerning the Protection of Telecommunication Lines against Harmful Effects from Electric Power and Electrified Railway Lines: Volume VIII Geneva, 1990 | 20 CHF |
| [Vol_IX] Directives Concerning the Protection of Telecommunication Lines against Harmful Effects from Electric Power and Electrified Railway Lines: Volume IX Geneva, 1990 | 84 CHF |
