Although Russell included in his general index most of the authors he cited in the Principles, he still omitted a fair number, including Moore for one article and his own writings many times. Some of his citations are incomplete, vague, or in error. This index offers full citations for all 166 of his references to the literature of his subject.
"A Bibliographical Index for The Principles of Mathematics,"
Russell: the Journal of Bertrand Russell Studies:
2, Article 5.
Available at: http://digitalcommons.mcmaster.ca/russelljournal/vol20/iss2/5