Ottoi Calin (March 1886 - April 1, 1917) was a Romanian physician, journalist and socialist militant, considered one of the theoreticians of the Romanian workers' movement during the early 20th century.
Author: unknown/uncredited Source: Presa muncitoreasca ?i socialista din România. Vol 2 (1900-1921), Part I. Bucuresti : Editura Politica, 1966 License: PD Romania photos