Roget's pocket thesaurus based on roger's international thesaurus of English Words and phrases - Mawson, C. O. Sylvester (Christopher Orlando Sylvester), 1870-1938. (New York Pocket Books, 1946)
'This pocket thesaurus was originally published ... as Roget's treasury of words ... December 1923.'
'Pocket Book edition published September 1946.'
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Keywords: English language -- Synonyms and antonyms