![(archived) Guide C Reference data (1986)](/media/hfcnu25x/archived-square.jpg?anchor=center&mode=crop&width=640&rnd=133408226138900000)
This edition of Guide C was superseded in 2001 and 2007. The current edition can be found here: Guide C Reference data (2007)
This edition of Guide C was superseded in 2001 and 2007. The current edition can be found here: Guide C Reference data (2007)