W Economic sectors > W.20 R&D sector > Social research > Opinion poll

N Related subject areas > N.06 Social sciences > N.06.01 Theories and approaches in the social sciences > Social research > Opinion poll

... > N Related subject areas > N.06 Social sciences > N.06.01 Theories and approaches in the social sciences > Social sciences > Social research > Opinion poll

W Economic sectors > W.21 Business Services > W.21.02 Advertising industry and opinion polling > Opinion poll