Leisure Recreation 66 Social aspects 27 Congresses 18 Sports 10 Work 10 Research 9 Periodicals 7 History 6 Tourism 6 Economic aspects 5 Education 5 Hours of labor 5 Sociological aspects 5 Bibliography 4 Leisure industry 4 Management 4 Outdoor recreation 4 Psychological aspects 4 Recreational surveys 4 Social conditions 4 Women 4 Amusements 3 Older people 3 Popular culture 3 Quality of work life 3 Recreation leadership 3 Statistics 3 Study and teaching 3 Time management 3