Processo do símbolo da cortiça : CorkMark / Maria Carolina Varela
Problèmes et calculs pratiques d'électricité / M. Aimé Witz
Estudios referentes á las corrientes eléctricas alternas : para uso de los estudiantes y de los ingenieros / T. H. Blakesley; trad. Eugenio Guall
Lightning conductors and lightning guards : a treatise on the protection of buildings, of telegraph instruments and submarine cables, and of electric installations generally, from damage by atmospheric discharges / Oliver J. Lodge
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