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Call-alert paging for pager-phone systems.
Dobroski H Jr.; Lipoff SJ; Trombly JE
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC-8743, 1977 Jan; :24-28
IH; Information Circular
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC-8743
Page last reviewed: October 29, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division