1. Circular letter addressed to the national committees in the several countries proposing to take part in the congress Author(s): National Prison Association of the United States, author. Publication: New York : American Church Press Company, 1871 Subject(s): PrisonsCriminal LawCongresses as TopicOrganization and AdministrationInternational Penal and Prison Congress
2. Second circular letter, addressed to the national committees in the several countries proposing to take part in the congress Author(s): National Prison Association of the United States, author. Publication: New York : American Church Press Company, printers, 1872 Subject(s): PrisonsCriminal LawCongresses as TopicOrganization and AdministrationInternational Penal and Prison Congress