P.R. - Ontario Practice Reports (Canada) Jurisdiction: Canada Originally, Upper Canada Practice Reports. Published from 1850 to 1900. Continued by the Ontario Law Reports (O.L.R.). REFERENCES: Duhaime, Lloyd, Legal Citations Legal Citation Guide Frequently need citation information? Try our search provider (works in most modern browsers) If you find an error, omission or if have a suggestion for a law report, legal periodical or abbreviation, we'd love to get your input!