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