Marx Brothers Jones (Harrison Ford) to keep it out of Nazi hands. When Indy misconstrues the purpose of being sent it and returns it to his father instead, his father berates him by saying "I should have mailed it to the Marx Brothers!". In the 1996 musical, By Jeeves, based on the Jeeves stories by P.G. Wodehouse, during "The Hallo Song", Gussie Fink-Nottle suggests "You're either Pablo Picasso", to which Cyrus Budge III replies "or maybe Harpo Marx!" In Rob Zombie's 2003 film House of 1000 Corpses, the clown Captain Spaulding is named after the Marx brothers character, and this is mentioned
Biographies of Karl Marx (1925), Japanese (1930), Spanish (1932), and English (1935). Marx: Man and Fighter is a biography by Boris Nicolaievsky, first published in German in 1933. It was translated into English by Otto Mänchen-Helfen and published in 1936. Some subsequent English editions restore the notes, appendices, and bibliography omitted from the first English edition. Karl Marx: His Life and Environment is a 1939 biography of Karl Marx by Isaiah Berlin, in which Berlin argues that Marx's system of thought depends upon indefensible metaphysical presuppositions. Karl Marx: His Life and Thought is a 1973 biography of Karl Marx by political scientist David McLellan.