http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Isaac Newton's papers & letters on natural philosophy and related documents
Papers & letters on natural philosophy and related documents
edited, with a general introd., by I. Bernard Cohen, assisted by Robert E. Schofield ; with explanatory prefaces by Marie Boas ... [et al.].