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Marx, Leo: The Machine in the Garden. Technology and the Pastoral Ideal in America. New York 1964. Internet: https://books.google.de/books?id=r6M-WN1ucSEC&printsec=frontcover&dq=The+Machine+in+the+Garden.+Technology+and+the+Pastoral+Ideal+in+America&hl=en&sa=X&ved=0ahUKEwj3842ctPTRAhWDbxQKHcgUB2IQ6AEIHDAA#v=onepage&q=The%20Machine%20in%20the%20Garden.%20Technology%20and%20the%20Pastoral%20Ideal%20in%20America&f=false.