Washington DC : Labor-Management Relations Service of the United States Conference of Mayors, National League of Cities, National Association of Counties, 1971
Revised edition
Washington, D.C. : Labor-Management Relations Serviceof the United States Conference of Mayors, National League of Cities, National Association of Counties, 1972
Washington, DC : Labor-Management Relations Service of the United States Conference of Mayors, National League of Cities, National Association of Counties, 1973
Washington DC : Labor-Management Relations Service of the United States Conference of Mayors, National League of Cities, National Association of Counties, 1973