Primary law is always organized in multiple ways--chronologically, by topic and by citation.
| Institution | Kind of Law | How the Law is Published (Arrangements)? | ||||||
| Chronologically | ![]() |
Topically | ![]() |
By Citation | ![]() |
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Legislature | Statutory Law |
Shepard's/KeyCite/Annotated Codes (video) |
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Courts | Case Law | Case Reports |
Case Digests (Summaries of Primary Authority) (video) |
Shepard's/KeyCite/ALR (video) | |||
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Agencies & Executive Branch | Administrative Law | Shepard's/KeyCite (video - same as above) | |||||
Table based upon Christopher G. Wren and Jill Robinson Wren, The Teaching of Legal Research, 80 Law Libr. J. 7, 35 (Matrix A) (1988). See also Christopher G. Wren and Jill Robinson Wren, The Legal Research Manual 17 (fig. K) (2d ed. 1986).

Attribution: Dr. Peter Hook, Director and Associate Dean of the Law Library at Washington University Law Library in St Louis.