The 1991 census on CD-ROM.
Cambridge : Chadwyck-Healy,
1994.
User's manual title: 1991 census on cd-rom : user manual.
System requirements: IBM PC/AT or 100% 80286 compatible; 4 megabytes of RAM; 6 megabytes free on the hard disk; EGA or VGA card and monitor; DOS version 3.3 or above; Microsoft Windows 3.10 or above; CD-ROM drive with Microsoft CD-ROM extensions 2.10 or above; Microsoft or compatible mouse.