History 22 Description and travel 18 Directories 18 Maps 17 Real property 17 Museums 16 Associations, institutions, etc 13 more ... Societies 13 Local transit 12 Periodicals 11 Economic conditions 9 Societies, etc 9 Street-railroads 9 Business enterprises 8 Women 8 Women college graduates 8 Ethnic groups 7 Societies and clubs 6 Transportation 6 Commerce 5 Mafia 5 Railroads 5 Social registers 5 Streets 5 Diseases 4 Regional planning 4 Special libraries 4 Vietnamese Americans 4 Bicycle touring 3 Buildings 3 Central business districts 3 Clubs 3 Commuting traffic 3 Ethnic relations 3 Guidebooks 3 Historic buildings 3 Industries 3 Korean Americans 3 Library cooperation 3 Library resources 3 less ...