Sigma Sigma Omicron (ΣΣΟ) was a national collegiate sorority operating under that name in the United States from November 1, 1920 to 1927. It has had several successor names.
Sigma Sigma Omicron (ΣΣΟ) was a national collegiate sorority operating under that name in the United States from November 1, 1920 to 1927. It has had several successor names. (en)