African-American book publishers in the United States, 1960–80

While African-American book publishers have been active in the United States since the second decade of the 19th century, the 1960s and 1970s saw a proliferation of publishing activity, with the establishment of many new publishing houses, an increase in the number of titles published, and significant growth in the number of African-American bookstores. African-American commercial book publishers released a total of 154 titles in the period 1970–74, a dramatic rise from the previous high of 21 titles published during the five-year spans of 1935–39 and 1940–44.

Source: Wikipedia — African-American book publishers in the United States, 1960–80 (CC BY-SA 4.0)