Estelle Sylvia Pankhurst (May 5, 1882 - September 27, 1960) was a campaigner in the suffragette movement in the United Kingdom, and a prominent left communist. She was born in Manchester, a daughter of Dr. Richard Pankhurst and Emmeline Pankhurst, members of the Independent Labour Party and much concerned with women's rights. Her sister, Christabel, would also become an activist. Wikipedia
Communism or Reforms two articles by Sylvia Pankhurst and Anton Pannekoek, first published in the Workers Dreadnought in 1922. af-north.org/other%20pamphlets/othertexts.htm
Sylvia Pankhurst , the daughter of Dr. Richard Pankhurst and Emmeline Pankhurst , was born in Manchester in 1882. www.spartacus.schoolnet.co.uk/WpankhurstS.htm
The definitive Wikipedia entry for Sylvia Pankhurst. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Sylvia_Pankhurst