Hysteria Hard Rock 1987.08.03 LP, Cassette Studio PolyGram Records Inc. 830-675-1/4 042283067547 Robert John "Mutt" Lange This album was Def Leppard's fourth album, the first to be released since 1983's "Pyromania" Hysteria Hard Rock 8-3-1987 Compact Disc Studio PolyGram Records Inc. 830-675-2 042283067523 Robert John "Mutt" Lange This album was Def Leppard's fourth album, the first to be released since 1983's "Pyromania"