Iron Maiden's only constant member since their inception was credited for a song on what album?
Run to the Hills:  It was released as their sixth single and the first from the band's third studio album, "The Number of the Beast" (1982). Steve Harris (musician):  He has been the band's only constant member since their inception in 1975 and, along with guitarist Dave Murray, to have appeared on all of their albums.
i don't know