http://www.marxists.org/archive/lenin/works/1921/oct/17.htm http://www.marxists.org/archive/lenin/works/1921/oct/17.htm New Economic Policy http://www.marxists.org/archive/lenin/works/1921/oct/17.htm http://www.marxists.org/archive/lenin/works/1921/oct/17.htm concept to explain the concrete historical conditions http://www.marxists.org/archive/lenin/works/1921/oct/17.htm concept to explain the concrete historical conditions New Economic Policy New Economic Policy New Economic Policy Lenin http://www.marxists.org/archive/lenin/works/1921/oct/17.htm En http://www.marxists.org/archive/lenin/works/1921/oct/17.htm https://www.marxists.org/archive/lenin/works/1921/oct/17.htm New Economic Policy http://www.marxists.org/archive/lenin/works/1921/oct/17.htm admitir Lenin http://www.marxists.org/archive/lenin/works/1921/oct/17.htm