The purpose of the work is to make an initial identification of monographs; state and local documents; pamphlets; broadsides; and other material published in America during the period from 1820-1875. The bibliography is based upon the work of the American Imprints Inventory of the Depression era WPA, but draws heavily upon more recently published national and state bibliographies. It incorporates the theses done at Catholic University, which continues the publication program of the Historical Records Survey. Arrangement is by author. The essential elements of description are given and, in most cases, location of several extant copies are provided. 1846 is the most recent volume in the series.