The links on this list link to the URSUS catalog records, not to the full text. Some of these titles do have electronic full text available; see the "online" tab above.
Social Work Almanac by 
Statistical Handbook on the Social Safety Net by 
Statistical Handbook on the World's Children by SSubject encyclopedias provide an overview of your topic, often including history, current state, policy issues & relevant theories, while specialized dictionaries provide definitions of terms or phrases unique to the field.
Comprehensive Handbook of Social Work and Social Welfare, the Profession of Social Work by 
Encyclopedia of Measurement and Statistics
Encyclopedia of Social Welfare History in North America by 
Gay Histories and Cultures
A Dictionary of Social Work and Social Care, 2nd ed by 
Encyclopedia of Social Welfare History in North America, E-book by 
Encyclopedia of Social Work by 
Social Policy: Essential primary sources by 