Philadelphia: The American Philosophical Society, November 1966. Paperback. 130, text in English with a brief glossary of technical Arabic, oversize paperbound in pea-green plain printed wraps (a series format); spine panel is heavily tanned (lettering remains clear), there is some edgewear, mild marginal creasing and a few tiny dog ears, sound copy entirely clean within. Transactions of the American Philosophical Society held at Philadelphia for Promoting Useful Knowledge. New series--volume 56, part 7, 1966.