The Cambridge collection
Subtitle: 30 programs for the ZX81
By: Richard Francis Altwasser.
Publisher: R. Francis [Altwasser]; Imprint unknown
Published: 1981
Place of publication: Cambridge (22 Fox Hollow, Bar Hill, Cambridge CB3 8EP)
Language: eng
Number of pages: 64
Subjects: Sinclair ZX81 (Computer) -- Programming.