The mass strike - Rosa Luxemburg The Mass Strike, the Political Party and the Trade Unions by Rosa Luxemburg, written and first published: 1906
A Contribution to the Critique of Marx - John Crump This essay was published in pamphlet form in February 1976. It was published jointly by Social Revolution and Solidarity.
Value, price and profit - Karl Marx Speech by Marx to the First International Working Men's Association, June 1865