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Hirsh, Richard F.,. Powering American farms: the overlooked origins of rural electrification / Richard F. Hirsh. — 1 online resource. — Доступ по паролю из сети Интернет (чтение, печать, копирование). — <URL:https://elib.spbstu.ru/ebsco/pdf/3121953.pdf>. — <URL:https://elib.spbstu.ru/ebsco/epub/3121953.epub>. — Текст: электронный
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