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Oxford University Press
> Michael Rhys Powicke
Michael Rhys Powicke
title
ISBN-13
(ISBN-10)
year of publication
Military Obligation in Mediaeval England
978-O-19-82O695-8
(O-19-82O695-X)
1962
M.P.
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m r
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Michael P.
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Michael R.
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R. P.
Michael Ribbert