Brian Silver, Department of Political Science, University of Wisconsin-Madison. Data from the 1926 and 1959 Soviet censuses.
Documentation includes a detailed codebook.
Extensive notes on sources of information, problems encountered in coding particular pieces of information, and estimating procedures used for some of the variables are included. As collected by Brian Silver. The central goal was to compile all available quantitative information on the linguistic practices and level of socio-economic development of Soviet ethnic groups.