Lyn E. Vargo, Carol Wiltgen Trotter ; editor, Lynn G. Wellman ; consulting editor, Margaret Comerford FredaEducation Services Dept., March of Dimes Birth Defects Foundationc1998
Mary Lee Barron ; editor, Lynn G. Wellman ; consulting editor, Margaret Comerford FredaEducation Service Dept., March of Dimes Birth Defects Foundationc1998