Social surveys 220 Surveying 92 Social conditions 89 Public opinion 81 Social history 74 Social life and customs 73 Mass society 72 History 61 Methodology 48 World War, 1939-1945 39 Research 36 Educational surveys 33 Market surveys 31 Surveys 29 Social sciences 24 Working class 23 Questionnaires 20 Reconstruction (1939-1951) 19 Quantity surveying 18 Evaluation 16 Interviewing 15 Social aspects 15 Employment 14 Statistical methods 14 Attitudes 12 Economic conditions 12 Recreation 12 Soil-surveys 12 Politics and government 11 Statistics 11