[word=","] [lemma=report] [lemma=","] □ □
[word=","] [lemma=report] [lemma=","] [□] □
[word=","] [lemma=report] [lemma=","] □? □
Includes research briefings , reports , government documents , journal articles , and websites . It indexes journals , reports , government documents , directories , books , statistical yearbooks , and conference proceedings .