7":1990 UK (Parlophone;R6269)
03:56 So Hard
04:21 It Must Be Obvious
CSS:1990 UK (Parlophone;R6269)[bright blue css]
03:56 So Hard
04:21 It Must Be Obvious
CSS:1990 UK (Parlophone;R6269)[white css]
03:56 So Hard
04:21 It Must Be Obvious
CD5:1990 UK (Parlophone;CDR 6269)
03:56 So Hard
04:21 It Must Be Obvious
06:30 So Hard (Extended Dance Mix)
12":1990 UK (EMI;12R 6296)
06:30 So Hard (Extended Dance Mix)
04:21 It Must Be Obvious
07:30 So Hard (Dub)
12":1990 UK (Parlophone;12RX 6269)
05:27 So Hard (KLF vs. Pet Shop Boys)
09:22 It Must Be Obvious (UFO mix)
7":1990 DE (EMI;006-204062-7)
03:56 So Hard
04:21 It Must Be Obvious
CD5:1990 DE (Parlophone;560-204062-2)
03:56 So Hard
04:21 It Must Be Obvious
06:30 So Hard (Extended Dance Mix)
12":1990 DE (Parlophone;060-204062-6)
06:30 So Hard (Extended Dance Mix)
04:21 It Must Be Obvious
07:30 So Hard (Dub)
12":1990 DE (EMI;060-204092-2)
05:27 So Hard (KLF vs. Pet Shop Boys)
09:22 It Must Be Obvious (UFO mix)
CD5:1990 DE (EMI;CDP 5602040922)
05:27 So Hard (KLF vs. Pet Shop Boys)
09:22 It Must Be Obvious (UFO mix)
12":1990 DE (EMI;204177-6)
07:42 So Hard (Red Zone Mix)
06:20 So Hard (12" Remix)
03:25 So Hard (Radio Mix)
CD5:1990 DE (EMI;560 204177-2)
06:20 So Hard (12" Remix)
07:42 So Hard (Red Zone Mix)
03:25 So Hard (Radio Mix)
04:00 So Hard (Eclipse Mix)
CSS:1990 US (EMI;4JM-50329)
03:56 So Hard
04:21 It Must Be Obvious
CSS:1990 US (EMI;4V-56194)
06:30 So Hard (Extended Dance Mix)
03:56 So Hard (Single)
07:30 So Hard (Dub)
04:21 It Must Be Obvious
CD:1990 US (EMI;E2-56195)
06:30 So Hard (Extended Dance Mix)
03:56 So Hard (Single)
07:30 So Hard (Dub)
04:21 It Must Be Obvious
08:40 Paninaro (Italian Remix)
12":1990 US (EMI;V-56194)
06:30 So Hard (Extended Dance Mix)
03:56 So Hard (Single)
07:30 So Hard (Dub)
04:21 It Must Be Obvious
7":1990 FR (EMI;204062-7)
03:56 So Hard
04:21 It Must Be Obvious
12":1990 FR (EMI;204062-6)
06:30 So Hard (Extended Dance Mix)
04:21 It Must Be Obvious
07:30 So Hard (Dub)
7":1990 IT (EMI;204062)
03:56 So Hard
04:21 It Must Be Obvious
12":1990 IT (EMI;204062-6)
06:30 So Hard (Extended Dance Mix)
04:21 It Must Be Obvious
07:30 So Hard (Dub)
7":1990 PT (EMI;204062-7)
03:56 So Hard
04:21 It Must Be Obvious
CD3:1990 JP (EMI;TODP-2203)
03:56 So Hard
04:21 It Must Be Obvious
7":1990 AU (EMI;2481-7)
03:56 So Hard
04:21 It Must Be Obvious
CSS:1990 AU (EMI;2481-7)
03:56 So Hard
04:21 It Must Be Obvious
7":1990 UK (Parlophone;RDJ 6269)
03:56 So Hard
04:21 It Must Be Obvious
12": 1990 UK (Parlophone; 12RDJ 6269)
06:30 So Hard (extended mix)
07:30 So Hard (dub mix)
CD5: 1990 US (EMI; DPRO-4650)
03:56 So Hard (7" mix)
05:00 So Hard (9" edit mix)
06:30 So Hard (extended dance mix)
07:30 So Hard (dub mix)
12": 1990 US (EMI; SPRO-04673) [promo]
05:27 So Hard (klf vs. pet shop boys)
09:22 It Must Be Obvious (ufo mix)
03:56 So Hard ["lp version"]
12":1990 US (EMI;SPRO-04690)
06:20 So Hard (12" Remix)
07:42 So Hard (Red Zone Mix)
03:25 So Hard (Radio Mix)
04:00 So Hard (Eclipse Mix)
12": 1990 BR (Parlophone; 995122-0) [promo]
03:56 So Hard (7" mix) [33rpm]
03:56 So Hard (7" mix) [45rpm]
7": 1990 HK (EMI; RDJ 6269) [white-label promo]
03:56 So Hard
04:21 It Must Be Obvious
7": 1990 MX (EMI; 700912) [2xA Mexican promo; "Tan Dificil"]
03:56 So Hard
7": 1990 PH (Parlophone; E-USA-89x016-7 / R6269) [double-A promo; Phillippines]
03:56 So Hard