Low-frequency cables with polyolefin insulation and moisture barrier polyolefin sheath - Part 4: Unit type, unfilled, moisture barrier polyethylene sheathed cables with copper conductors, solid insulation and integral suspension strand IEC 708-4 /  
 IEC 708-4 
ISO, IEC. 
 - First edition. 
 - Geneva :   ISO :   IEC,   1981. 
 - 9 stron ;   30 cm.