Baber also cared about social issues. She was called a feminist, anti-racist and anti-imperialist. In 1926 she represented the women of Puerto Rico to help women get the right to vote. She worked as chairman of the Pan-American Committee of the International League for Peace and Freedom.
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- Marilyn Ogilvie and Joy Harvey, ed. (2000). The Biographical Dictionary of Women in Science. Great Britain: Routledge. pp. 65-66. ISBN 0-415-92038-8. Retrieved 3 June 2011.
- Geographic Society of Chicago. "Our History". Retrieved 4 June 2011.
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- Photographs from the Records of the National Woman's Party. "Baber, Zonia". The Library of Congress, American Memory. Retrieved 4 June 2011.