The Camera (Ladybird How It Works Series 654)
by David Carey Jr.,B.H. Robinson
ISBN 13: 9780721402550
Format: Hardcover (52 pages) Publisher: Ladybird Published: 29 Jan 1970
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The Computer (Ladybird How It Works)
by James Blythe,David Carey Jr.
ISBN 13: 9780721406190
Format: Hardcover (52 pages) Publisher: Ladybird Published: 25 Jan 1979