LAZARCIK, Gregor - ZNAYENKO, Wassyl. Bulgarian Agricultural Production, Output, Expenses, Gross and Net Product, and Productivity, 1939 and 1948-1967. Edit. Thad P. Alton. 1. ed. New York : Economic Studies Riverside Research Institute, 1970. 62 s. Occasional Papers of the Research Project on National Income in East Central Europe, 32. [Počet ex. : 1, z toho voľných 1, prezenčne 0]