Harvard University, Cambridge, Massachusetts, USA - Tozzer Library

Yale University, New Haven, Connecticut, USA - Sterling Memorial Library

Stanford University, Stanford, California, USA - Stanford University Library

Staatsbibliothek zu Berlin - Preussischer Kulturbesitz, Berlin, Deutschland

Sistema Bibliotecario Ticinese, Lugano, Canton Ticino, Svizzera

Zentralbibliothek Zürich, Zurigo, Svizzera

E-Lib.ch, Svizzera