Analysis of variance od Iversen, Gudmund R., Norpoth, Helmut

Causal modeling od Asher, Herbert B.

Analysis of variance od Iversen, Gudmund R., Norpoth, Helmut

Operations research methods as applied to political science and the legal process od Nagel, Stuart S. 1934-, Neef, Marian

Causal modeling od Asher, Herbert B.

Tests of significance od Henkel, Ramon E. 1931-

Causal modeling od Asher, Herbert B.

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Introduction to factor analysis what it is how to do it od Kim, Jae-On

Interpreting and using regression. od Achen, Christopher H.