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%T The use of protest event data in comparative research: cross-national comparability, sampling methods and robustness
%A Koopmans, Ruud
%E Rucht, Dieter
%E Koopmans, Ruud
%E Neidhardt, Friedhelm
%P 90-110
%D 1998
%I Ed. Sigma
%@ 3-89404-182-X
%C DEU
%C Berlin
%G en
%9 Sammelwerksbeitrag
%W GESIS - http://www.gesis.org
%~ SSOAR - http://www.ssoar.info