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R.E. Ennis
E.E. "
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R. E.
title
ISBN-13
(ISBN-10)
year of publication
Logic in Teaching
978-0-13-540096-8
(0-13-540096-1)
1969
Ordinary Logic
978-0-13-639856-1
(0-13-639856-1)
1970
R.E. Enthoven