Institutional Books 1.0: A 242B token dataset from Harvard Library's collections, refined for accuracy and usability. - Matteo Cargnelutti; Catherine Brobston; John Hess; Jack Cushman; Kristi Mukk; Aristana Scourtas; Kyle Courtney; Greg Leppert; Amanda Watson; Martha Whitehead; Jonathan Zittrain (CoRR, 2025)