Thomson, P. G. (1880). A bibliography of the state of Ohio: Being a catalogue of the books and pamphlets relating to the history of the state. With collations and bibliographical and critical notes, together with the prices at which many of the books have been sold at the principal public and private sales since 1860. And a complete index by subjects. Cincinnati: Author.

Thomson, Peter Gibson. A Bibliography of the State of Ohio: Being a Catalogue of the Books and Pamphlets Relating to the History of the State. With Collations and Bibliographical and Critical Notes, Together With the Prices At Which Many of the Books Have Been Sold At the Principal Public and Private Sales Since 1860. And a Complete Index By Subjects. Cincinnati: Author, 1880.

Thomson, Peter Gibson. A Bibliography of the State of Ohio: Being a Catalogue of the Books and Pamphlets Relating to the History of the State. With Collations and Bibliographical and Critical Notes, Together With the Prices At Which Many of the Books Have Been Sold At the Principal Public and Private Sales Since 1860. And a Complete Index By Subjects. Cincinnati: Author, 1880.