Cambridge: American Academy of Arts and Sciences/Harvard University, 1965. Paperback. iv, pp.743-1173, introduction, footnotes, references, tables, very good trade paperback journal in printed wraps. Volume 94, issue #4 of the Proceedings of the American Academy of Arts and Sciences.
Introduction by Lyndon B. Johnson. Articles by St. Clair Drake, Whitney Young, Jr. and John Hope Franklin, among others.