Title: A hammer in their hands
Description: 'A Hammer in Their Hands' collects newspaper & magazine articles, advertisements for runaway slaves, letters, folklore, excerpts from biography & fiction, legal patents, protest pamphlets, & other primary sources to document the technological achievements of African Americans.
Subjects: TECHNOLOGY & ENGINEERING, Social aspects, Negers, General, Technologie, African Americans, Sociale aspecten, Technology, History, African americans, history