No Inv.: 608-617/P/Perp/96/10c
No Inv.: 977/S/Perp/91/1c~1699/S/Perp/88/1c~488/Perp/86/1c~600/Perp/86/1c~4287/Perp/86/1c~445/S/Perp/87/1c~2599/S/Perp/87/1c~415/S/Perp/92/1c~813-814/S/Perp/92/2c~1162/S/Perp/92/1c~229-230/S/Perp/9…
No Inv.: 110289/S/Perp/07/1c
Bibliografi : hlm. 320 No Inv.: 144199-144200/S/Perp/14/2c
Bibliografi : hlm. 254 No Inv.: 144222-144223/S/Perp/14/2c
Bibliografi : hlm. 274-277
No Inv.: 109287/S/Perp/07/1c
Judul asli : "Earth Our Crowded Space Ship"
No Inv.: 112-118/Perp/79/7c~626-627/Perp/79/2c