Alquimia: Ciencia y pensamiento a través de los libros. Llibres d'Alquímia de la Universidad Complutense de Madrid
Biblioteca de la Universitat de Barcelona - Fons de Reserva
Biblioteca Histórica Marqués de Valdecilla. Universidad Complutense de Madrid
Center for History of Physics. Niels Bohr Library Archives. American Institute of Physics
‘Dear Harry…’ – Henry Moseley: A Scientist Lost to War. Special exhibition at the Museum of the History of Science. University of Oxford
Dictionary of scientific biography. Charles Coulston Gillispie, editor in chief
From Alchemy to Chemistry: Five Hundred Years of Rare and Interesting Books. University of Illinois at Urbana-Champaign, Rare Book Special Collections Library
Gallica. Biblioteca digital de la Bibliothèque Nationales de France (BnF)
Linus Pauling: The Nature of the Chemical Bond. A Documentary History
Miguel A. Catalán. Físico español (1894-1957)
The Online Books Page. University of Pennsylvania
Science and Society Picture Library
Smithsonian Institution Library
Turning the Pages. Digital facsimiles of manuscripts of the Royal Society
