00622nam a2200217Ia 4500 CTU_82587 210402s9999 xx 000 0 und d 621.38 M391 Marvin, Carolyn When Old Technologies were new : Thinking about electronic communication in the late nineteenth century Carolyn Marvin New York Oxford University Press 1988 Telecommunication History 19th century QHieu Trung tâm Học liệu Trường Đại học Cần Thơ