University of Sydney Library
Among the collection are many rare items such as one of the two extant copies of the "Gospel of Barnabas" , and an annotated first edition of "Philosophiae Naturalis Principia Mathematica" by Sir Isaac Newton , which is also available in the Digital Collections . . 
<triplet> Philosophiae Naturalis Principia Mathematica <subj> Isaac Newton <obj> author <triplet> Isaac Newton <subj> Philosophiae Naturalis Principia Mathematica <obj> notable work