Hard Rock 1983 LP, Cassette Studio Mercury/PolyGram Records PolyGram Records Inc. 810-308-1/4 042281030840 Robert John "Mutt" Lange Pete Willis: Guitar Backing tracks Def Leppard's third album. Recorded 1982 Hard Rock 1983 Compact Disc Studio Mercury/PolyGram Records (US); Vertigo Records (UK) PolyGram Records Inc. (US; Phonogram Ltd. (UK) 810-308-2 042281030826 Robert John "Mutt" Lange Pete Willis: Guitar Backing tracks Def Leppard's third album. Recorded 1982