Penguin Books Ltd, Harmondsworth, England, 1968. “Economics has always been partly a vehicle for the ruling ideology of each period as well as partly a method of scientific investigation. ..... .... our task is to sort out as best we may this mixture of ideology and science” The book traces the relations between science and ideology over the last two hundred years, from Adam Smith, through Marx and Keynes, to current economic thinking. 12º, 140 p.+ 2 h., cartulina editorial, buen estado.