- Author: Lenin
- Date: 1915 – first published in 1925
- Location: Russia
- Link: www.marx2mao.com/Lenin/QD15.html
- PDF: see attachment at the bottom of this page.
- Author: Lenin
- Date: 1915 – first published in 1925
- Location: Russia
- Link: www.marx2mao.com/Lenin/QD15.html
- PDF: see attachment at the bottom of this page.