"1960Z"^^ . . . . . "Antonie (Anton) Pannekoek (2 January 1873 \u2013 28 April 1960) was a Dutch astronomer, Marxist theorist, and social revolutionary. He was one of the main theorists of council communism (Dutch: radencommunisme)."@en . "1960-04-28Z"^^ . . . . "Dutch politician" . "Pannekoek, Anton"@en . . "1873-01-02Z"^^ . . . . . "Antonie Pannekoek"@en . "1873Z"^^ . .