20231122143416.537941 Abstract-bulletin of NELA Research Laboratory Abstract-bulletin of NELA Research Laboratory / 0743-006X Ohio Abstract-bulletin of NELA Research Laboratory / hathi HathiTrust https://catalog.hathitrust.org/Record/103065013 1922/1922 2024-03-01 v.1, no. 3-4 (1922-25) v.1, no. 3-4 (1922-25) Preserved NELA Research Laboratory, 1917-1925. Abstract-bulletin of NELA Research Laboratory / National Lamp Works of General Electric Company. 0743-006X Abstract-bulletin of NELA Research Laboratory