LAZARCIK, Gregor. East German Agricultural Production, Expenses, Gross and Net Product, and Productivity, 1934-1938 and 1950-1970. 1. ed. New York : Economic Studies Riverside Research Institute, 1972. 76 s. Occasional Papers of the Research Project on National Income in East Central Europe, 36. [Copy count : 1, currently available 1, at library only 0]