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Book with white pages and various printed black symbols in an opened beige container with black binding.  Lying on top of it is another book with white pages printed with various black symbols and musical notes, and a black book cover. A labelled cassette tape is on the right.
Two opened books and a cassette tape
Source: Audible visible symbolic technology [kit]
by George A. Walker -- [Toronto : Columbus St. Press], c1988. -- 1 book and 1 sound cassette ; in case, 13 x 9 x 6 cm. -- ISBN 0921166060
© George A. Walker. Reproduced with the permission of the Loving Society of Letterpress Printers and the Binders of Infinitive Love.

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