81/ 17 Barbarus, J. Geomeetriline inimene. V. kogu värsse. Tallinn, Propeller, 1924, 109,(3)p., woodcut ills. and orig. wr. des. by J. VAHTRA.

= Global Avantgarde Estonia 6; Geometrical Man p.81; Futurisms in the World p.290: "A book of experimental poems that even in its title, 'Geometric Man', shows the influence of the reflections on mechanized man foreshadowed in Marinetti's manifesto L'homme multiplié et le règne de la machine". One of the most striking Estonian avant-garde publications.