Illustration to 'For the voice' by Vladimir Mayakovsky , by el lissitzky , 1920 , illustration , Constructivism style , from the series For the voice
A book is open to a page with a circle on it.
A book is open to a page. The page is white with a thin brown border. In the middle of the page is a circle. Inside the circle is a square with the letter "B" inside it. 