Books like Büyük Sümerce Sözlük
Nafiz Aydın
Büyük Sümerce Sözlük is 1,437 pages, about 26 hours 21 minutes at 250 words a minute.
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The Comprehensive Word Guide 16.7 h 
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Websters' First New Intergalactic Wickedary of the English Language 5.7 h Riset Operasi 2.2 h Bar height shows length. Estimated at 250 words a minute.