What pamphlet did Karl marx and friedrich engels write?

Together Marx and Engels wrote The Holy Family, The German Ideology and most famously, The Communist Manifesto. By themselves, though with help from each other, Marx wrote Capital, The Civil War in France, AContribution to the Critique of Political Economy, and many other works. Engels wrote Anti-Duhring, The Condition of the Working Class in England in 1844, The Peasant War in Germany, Revolution and Counter-Revolution in Germany and others.