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Limited ed. of 190 numbered copies, of which 175 are bound in quarter leather and 15 are numbered I to XV, bound in full leather and are signed by the poet.
Originally published: London : Macmillan, 1975.
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Laboratories of the spirit by R. S. Thomas. Published by Gwasg Gregynog in 1976. Publication and catalogue information, links to buy online and reader comments.