Description
1932, Heavy Current Protection Instructions (Appendix to the Telegraph Construction Code), February 1932 edition, For official use only, 140 pages, illustrations, with the usual amendment notes, 2 appendices, regular copy #46790
1932, Heavy Current Protection Instructions (Appendix to the Telegraph Construction Code), February 1932 edition, For official use only, 140 pages, illustrations, with the usual amendment notes, 2 appendices, regular copy #46790